Adam Pascale
@SeisLOLogist
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Seismologist; Chief Scientist @AusQuake (SRC, Australia). I’m also SeisLOLogist on Bluesky, TikTok, Instagram & Threads #earthquake #scicomm
Melbourne, Australia
Joined April 2015
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This magnitude 4.0
#earthquake
in
#Melbourne
’s north, whose epicentre was about 25km from my home, decided to wake me up just before midnight so I could spend the first few minutes of my birthday working out how to go Live on Twitter!🤦♂️
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Earthquakes land-forming
The earthquake that struck Japan’s Noto peninsula on Monday was so strong that the coastline has moved up to 250 meters offshore due to significant land uplift.
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Last night's magnitude 4.0 was the largest
#earthquake
within 40km of
#Melbourne
in over 120 years, the last being a magnitude 4.5 in 1902.
The
@GeoscienceAus
station at Greenvale (nearest the epicentre) was one of the first seismograph locations established by
@AusQuake
in 1976.
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At magnitude 5.8, this is the largest onshore earthquake in Victoria in recorded history. Aftershocks every few minutes, with the largest a 4.7 about 15 minutes after the main shock at 9:15am local time
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What I got for my birthday:
• an earthquake
• 2K follower milestone on Twitter & TikTok
• sleep deprivation, and
• Panettone-inspired “pastry stout”
Yummy.
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I’m saddened to see some negativity to our June logo change, particularly on Facebook. The change had the bonus effect of acting as a surfactant, allowing scum to rise to the surface to be scooped away. Those not open to inclusion and diversity in our community will not be missed
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Thomson Dam was engineered considering the potential for reservoir triggered seismicity (RTS) and monitored for years before (and decades after) construction. Here’s 45 years of data. Shallow (red) earthquakes occur as the reservoir fills. 12 years later a nearby fault activates
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Imagine you’re looking down on a building. During this M6.1 earthquake the top floor (red dot) & middle (green) floor are dancing around a lot more than the input ground motion (blue). Great visualisation by
@juansantivel
using real structural monitoring accelerograph data 🏢💃
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Just a reminder for any teachers who want their students to get hands-on with locating an earthquake, the Quick Quake app I designed is available for free in the iOS
@AppStore
and includes a demo earthquake to play around with. FYI, vertical channel is the bottom of the 3 (ENZ)
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OMG. In my excitement I forgot I had a seismograph running in my garage. What a beautiful record. Super sharp P and S arrivals. This is very cool.
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Yet another magnitude 7 coming through just now. I can’t remember the last time there were so many large events in a sequence.
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This is getting weird. Yes, another earthquake that’s been felt near Melbourne, this time on the Mornington Peninsula. These events are unpredictable, but stress distribution has changed recently, so be prepared for more activity.
Another earthquake in the Melbourne metropolitan area! This time a 2.4 near Mt Martha.
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Can you run an earthquake observatory from home? Yes! Thanks to global seismograph networks and the Internet.
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If all of this talk about
#Melbourne
earthquakes makes you think you're feeling things - well, if you were in Ferntree Gully at 5:02pm it wasn't your imagination. It was magnitude 2.1
#earthquake
in the metropolitan area.
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If my design submission for the Seismica t-shirt contest doesn't win, I know what next year's SSA giveaway t-shirt is going to look like! The location of the map snippet I used should be obvious to many.
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If we still analysed seismic data using 0.1mm traces on paper, the paper would need to be 900km across to capture the full range of the earth’s motion due to earthquakes. The “dynamic range” of seismographs is tricky to explain, so let me know if this video does the trick.
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Digging through our archive room I just found this cool photo of a surface rupture cutting through a tilled field. This was a magnitude 6.1 earthquake near Cadoux in Western Australia on 02 June 1979.
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The combination of magnitude, depth/distance, aftershocks and community vulnerability were significant contributors to the impact of the earthquakes in the Türkiye/Syria region. A terrible tragedy by any measure.
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Who’s coming to
#SSA2022
? Come and say hi and grab a free expresso and/or a super seismology t-shirt - while they last! Yes, I have a Nespresso machine at my booth! Coffee is life.
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An experiment: if you see this, hit the ❤️
I’ve been reluctant to abandon this platform at the thought of losing connections, but I suspect that less than 10% of my followers are active/human - roughly the follower count I have at the other places, so I’d like to test my theory
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A quick map of the 48 magnitude 5.8+ earthquakes over the past 150 years. This is the only one in Victoria
#earthquakemelbourne
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I’ve walked over these rocks near Apollo Bay for decades, most recently with
@DrWendyRocks
, and never noticed the hundreds of
#dinosaur
#footprints
that I’ve probably tripped over. It’s suspected they might be from the Australovenator ("southern hunter"), a carnivorous
#theropod
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Aftershocks often follow a pattern of decay, so we can forecast what is likely to happen after a major earthquake, but we still can’t predict exactly when or where they’ll strike
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Here's the last 20 years of earthquakes on the Mornington Peninsula. On average one of these earthquakes is felt every 2 years. Two in the region were reported as being felt last year.
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Here's an exercise for
#ScienceWeek
- locate an earthquake!
@AusQuake
has just released an update to the free Waves app, and there's a downloadable Melbourne earthquake to test your skills. It's fun to play with the depth slider to see how your P & S arrival picks fit the model.
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This bouncing animation of earthquake depths shows a distinctly vertical north-south fault lineation. Data is from 400+ earthquakes in the first 12 days after the Mw5.9 Woods Point earthquake.
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We clearly recorded the meteor event across our Victorian network over a period of ~5 minutes. It's first visible on our station in Mildura, then across to Melbourne, continuing to the east of the state. Travel times don't fit with our air velocity model, so maybe multiple booms?
This was probably a sonic boom from the meteor seen around the same time, which could shake houses and seem like it was the earth moving. Very disappointed I didn’t see/hear anything ☹️
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This is a real-time playback of last year’s magnitude 5.9 earthquake near Melbourne. We’re not set up for earthquake early warning, but I will be using this animation in an upcoming video to show how EEW works.
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It’s probably worth mentioning that today’s magnitude ML5.1 at 2:11am is the largest earthquake to have occurred in Victoria since the ML6.0 in September 2021
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Here’s the day so far. 2300 is 9am local time, each line is an hour. Aftershocks every few minutes, generally diminishing in frequency and magnitude
#earthquake
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I just felt a small earthquake in Melbourne. More info shortly.
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Let’s build a geoscience community over there. I’m following the few of us that I’ve found so far. You can find me by searching for SeisLOLogist or my name.
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OMFG. Is that my seismograph in the freaking OPENING SHOT of the new Godzilla x Kong trailer? You bet your furry and scaly CGI’d arses it is. Woo hoo!
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Wow. Tsunami warning was issued for Australia’s east coast. Eruption was reportedly heard in NZ 2200km away. Tsunami has caused damage in Tonga and was observed in Fiji.
Tonga's Hunga Tonga volcano just had one of the most violent volcano eruptions ever captured on satellite.
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An update on the is morning’s Otway Ranges
#earthquake
thst was felt across Victoria.
Featuring our
#cavoodle
puppy Cinnamon
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Ooh, I made a pretty thing for morning tea for my workmates. It has an inverted velocity model to earth - higher densities at the surface. Choc crumb base, white choc/espresso/walnut fudge, caramel toffee, and white/dark chocolate as the top layer.
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😂A quick personal experience piece - not a bad photo. I had to wear my Seismology shirt today!
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Over the last 7 hours there have been dozens of earthquakes off the southeast coast of the Philippines. Traces are from a station in South Australia. The largest was a magnitude 7.4 on hour 14. The quake on hour 12 is a magnitude 5.8 earthquake in the Banda Sea, north of Darwin
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I figured this was the weekend to get my bake on to explain delicious intraplate earthquakes in this Plate Pavlonics video
Awesome job Trev! I particularly liked your crumbly crust pavlova analogy to explain intraplate earthquakes. Now I want to bake two pavs and slowly push them together. I'm very happy to see my t-shirt design in the wild!
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While those lucky geologists like
@seis_matters
get to lick and chew the subject of their studies, we seismologists can’t taste quakes, so we’ll just have to console ourselves with Earthquake Cake - Snickers chocolate cake with cream cheese swirl, pretzels, cream & dulce de leche
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The last 19 hours in 19 seconds. Seismograms from the nearest station, about 35km hypocentral distance. Pretty much every spike above the background noise is an aftershock. There are hundreds, but they are starting to reduce in frequency.
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If you convert a seismogram into an audio file and play it back about 40x faster you can “hear” the earthquake. The is the vertical channel from the closest station to the Mw5.9 Woods Point earthquake that occurred almost a year ago. P to S was about 5 seconds in real time.
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I wouldn't have been able to get through the last 24 hours of interviews without the online resources complied by this wonderful geoscience community including
@Harold_Tobin
@patton_cascadia
@DrWendyRocks
@SquigglyVolcano
@JudithGeology
@DrLucyJones
@CPPGeophysics
& many others🙏
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A quick look at what an earthquake conference is like, featuring
@SeismoSocietyAm
@mtnmissy41473
@KaseyAderhold
@DisastrousComms
@seismohio
#SSA2022
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A preview of tomorrow’s video about Melbourne’s earthquakes, and if they are becoming more frequent.
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It was great to get the word out on
@abc730
about how to prepare for strong shaking if we get large aftershocks. Drop, Cover, Hold On.
#melbourneearthquake
What should you do in an earthquake? "If you feel strong motion, the phrase we use is 'drop, cover & hold on'. Get under a solid thing like a table & hold onto that table while it's shaking because it might move" - Adam Pascale, chief scientist, Seismology Research Centre
#abc730
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People in
#Melbourne
have been feeling
#earthquakes
lately, but does that mean the rate of events is increasing? Are earthquakes getting larger or closer to the population? Or are people remembering and noticing them more since the magnitude 5.9 that everyone felt in 2021?
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Can earthquakes trigger other earthquakes? How do we know if it is a foreshock, main shock, or aftershock?
#seismology
#scicomm
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Lucky
@PeckyQuake
is going out in the field to deploy four
@EarthquakesGA
aftershock kits around Woods Point to add to our permanent monitoring network. The activity is dropping off pretty quickly, but we might capture a decent shake yet
#earthquake
#Victoria
@AusQuake
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Earthquake tourism: there's lookout on the Great Ocean Road with a great view of a reverse fault in a cliff face. Can you see it? From the same platform you can also see some limestone stacks that people seem to be interested in: The Twelve Apostles!
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Near the epicentre, strong earthquakes can make the earth act like a speaker cone, creating sound waves in the audible frequency range. Further away it’s less of a bang and more of a rumble, which is usually the sound of buildings shaking.
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Here’s a preview of how to rapidly check an earthquake location using Quick Quake in portrait mode on iPhone. Coming soon. See me at the
@AusQuake
stand at ESC2018 for a hands-on demo this week.
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Two similar size earthquakes plotted at the same scale, felt over very different ranges. Much of Australia (left) has a cold hard crust that carries energy much further than in more seismically active regions like the west coast of America (right)
#attenuation
#scicomm
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One of our microseismic networks has a train line snaking through it. The emergent signals with symmetrical coda are long freight trains that rumble for 2 or more minutes, whereas passenger trains speed past for only 10-20 seconds 🚞
#WhatsTheWiggle
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Credit to
@SerafinoVino
for using a real seismogram on their "Magnitude" Shiraz label. I'll keep an eye out for it. The tasting notes start with:
"The wave length in this full bodied style..." ☺️
They also have a Terremoto Syrah for people who like associated terms.
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@AusQuake
sometimes reports earthquakes with negative magnitudes, which confuses a lot of non-seismologists. Hopefully this video will clear it up 😁
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I am so stoked that my seismograph is in a movie trailer! When I sent it off I thought it would be a blink-and-you’ll-miss-it appearance in the movie (like in Happy Feet 2) but this is awesome
@GodzillaXKong
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Come and say hi at
#SSA2023
and grab a free Namazu t-shirt before they all disappear. Around half were snapped up in the first hour at the welcome reception! Just look for the neon sign and the giant analogue seismogram. Thanks to
@gideon_tang
for the photo
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Here’s the last hour of data across our network (top to bottom, roughly Northeast to Southwest). Leftmost arrivals are P phases from Macquarie Island, centre show T phases from the same, then a Woods Point aftershock on the right (mostly just stations in Victoria).
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If you're into seismology and love programming, we have a vacancy opening up for a software engineer to work on our earthquake data analysis and management systems. Posting here because remote working is now a thing and we're good with that!
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Watching
@seismotom
at
#SSA2021
talking about seismic noise during COVID. This screen grab is such a great overview of the noise dropping over weekends, holidays and during lockdowns.
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On 22 September 2021 Victoria recorded its largest ever earthquake. Here’s a year of earthquakes in that area from 1 Sept 2021 to today
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Last week saw 78 earthquakes in a 42 hour period near Yea in central Victoria, about 75km NE of Melbourne. Our weekly map had them all clustered, so here’s a quick look at them spread over time
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It only shook for a few seconds in Melbourne, but was enough to wake people (including me) at 2:11am
Earthquake felt in Victoria. Preliminary magnitude 5.1. Location is 10km north of Cape Otway, close to the Great Ocean Road.
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I’ve refined the design of our portable 80W solar enclosure. Aluminium chassis is light enough to lift (without batteries installed) and the angled internal panel makes mounting and using the recorder/modem/solar regulator much easier.
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I’ve got my Friday seismology t-shirt on, so it must be time for another rapid fire explainer video. This time it’s about how we locate an
#earthquake
#scicomm
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3 months ago today Australia experienced its most widely felt earthquake in recorded history. Here is a plot of the 1100+ aftershocks since, along with an estimate of the energy release. Increase in small earthquake detectability a few days in due to extra stations being deployed
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Here's the last 12 hours of data from a station in Queensland, Australia, scaled to showing the larger earthquakes near New Caledonia. The smallest distinct one towards the end is magnitude 5.3, with the larger ones all above magnitude 6. The magnitude 7.7 clips out at this scale
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Seismic arrays can produce very cool data, from ground motion visualisations to mapping the lithosphere. And I totally didn’t get repeatedly tongue-tied saying “lithosphere” while making this video.
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And just like that we’ve run out of t-shirts on Day 2. A lot of people have asked what the big red Japanese characters mean: it says seismology. In English. Vertically. Wear your science with stealth. We’ll have to print more next year…
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That feeling when a significant earthquake occurs in an area where a new array has just been deployed 🤤
#DataScience
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Twinkle twinkle little quakes
Here’s a month of Woods Point shakes
North-south strike-slip, intraplate
Freaked out millions across states
Twinkle twinkle aftershocks
Now you know how Aussies rock
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Attending
#SSA2021
next week? Join me Wednesday 12:30pm at the innovation showcase where I launch a new free interactive earthquake location app: a simple tool for data processing & teaching. Need more incentive? I’ve reserved a few super seismo t-shirts for some lucky viewers!
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Just a quick reminder to be aware of
#neurodiversity
in
#science
. You may not know that some of your colleagues are on the
#autism
spectrum, so just be patient, empathetic & non-judgemental with everyone - it’s just a good approach to life. Here are tips from some ND colleagues:
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It's unusual for an Australian city to have 3 earthquakes on 3 different faults, all large enough to be felt, within a 6 day period.
It doesn't mean something bigger is building. These faults have just coincidentally reached their capacity to hold stress at roughly the same time.
Last week was quite eventful in Victoria, with earthquakes felt near Bendigo, in Ferntree Gully, and at Mt Martha, the latter being a magnitude 2.4 and the largest of the 58 earthquakes recorded. There were also 9 small aftershocks following the M4.0 quake west of Craigieburn.
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Look who came to visit
@DeeNinis
and I today - it’s the wonderful
@tamarahking
who has recently returned to Australia from the UK. The earthquake geology force is strong with these two!
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An hour after the magnitude 3.6 earthquake north of Mt Barker, a magnitude 2.2 occurred to the south. These events sit between the Willunga and Encounter Bay Faults at depths that mean it could be assigned to either fault, or to an as-yet unmapped fault.
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Farewell Washington. Thanks to everyone who attended
#SSA2022
and came to talk to me. I’m often anxious approaching people I don’t know, so I really appreciate it when others start the conversation. You’re all so clever and cool and interesting. See you next year in Puerto Rico!
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Teaser was too obvious: yes, I designed a super seismology t-shirt! I’ll be giving them away at SSA next year. If you‘re coming, comment with your size and I’ll put one aside. Sizes run a bit big: XL’s a loose fit on me; I can even squeeze into an M despite my
#dessertwars
diet🍰
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That’s a wrap on Day 1 of the Australian Earthquake Engineering Society conference. This is the first year my wife Liz has fully taken over organising duties, and she’s done a great job so far. Off to the bar we go!
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What a beautiful day to be canoeing Cascadia. Special thanks go to my morning chauffeurs Kate and Austin. I’ll never look at a muddy embankment the same way again. I’ve started listing people who were there, so please add in comments
@timblor
@nickgraehl
@SummerOhlendorf
#SSA2022
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Here's a quick summary of the Magnitude 4.8 Pinnaroo earthquake from 3:47am AEDT today. Relatively shallow at 7km deep, it was in the Big Desert Wilderness Area near the VIC/SA border, about 250km from Adelaide and 430km from Melbourne. Nearest seismic station was 130km away🧵👇
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Let’s talk WA earthquakes. Last night’s magnitude 5.3 near Marble Bar is one of about 120 earthquakes greater than magnitude 5 on record for the state. In the local area near Marble Bar there have been two of magnitude 5.0 (in 1975 and 1988), a 5.4 in 1963, and a 5.8 in 1982🧵👇
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Spectacular
#lightning
while flying
@VirginAustralia
over central
#nsw
last night. Also featuring my wife’s beautiful eyes.
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Iceland's earthquakes helped to track magma activity, enabling the evacuation of Grindavík before surface deformation led to all roads to the town being closed
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The SRC
@AusQuake
is now live-streaming seismic waveform data to YouTube. If you’re in southeast Australia and feel something, have a look. If it’s an earthquake it should be obvious. We try to filter out very distant quakes, but we’ll often see M5+ events from our plate boundary
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I extracted
@USGS_Quakes
data to check past large earthquake sequences. 2021 was the last cluster, northeast of NZ, but the remote location had less human impact. My thoughts are with the people of eastern Mindanao - enduring repeated ground shaking would induce anxiety for many.
Yet another magnitude 7 coming through just now. I can’t remember the last time there were so many large events in a sequence.
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It’s not just earthquakes that can shake your house. As we saw in Melbourne this week, atmospheric events like thunder and sonic booms often generate reports of seismic events.
Contact
@seismo_steve
if you want to know more about the meteor paper I flash up in the video.
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I’m holidaying in Japan, but this earthquake still managed to wake me up, along with a number of Victorians! Remember to fill out an intensity report by following the links
@EarthquakesGA
if you experienced it
Woods Point in Victoria’s east continues to have aftershocks to the magnitude 5.9 earthquake in Sep2021. A few minutes ago this magnitude 4.5 earthquake struck there, the largest since the sequence began.
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My abstract has been accepted! I’ll be presenting for the first time in the main program
@SeismoSocietyAm
in April. I’ll be talking about earthquake
#scicomm
in stable continental regions, which was certainly put to the test last year! See you there 😁
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It‘s been years since my last in-person incursion to a primary school, so it was great fun to talk Earthquakes, Tsunamis and Volcanoes to 100+ grade 5/6 students. Great engagement, heaps of questions. My trusty drum recorder and slinky were the stars of the show.
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I’m not at
#AGU21
but if anyone there is wearing one of my super seismology t-shirts, send me a pic.
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It was great to see so many of my Twitter friends in the flesh at
#SSA2023
and to thank them for helping me be a better seismologist and science communicator.
@SeismoSocietyAm
put on a great event as always. See you again next year!
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Here’s a flashback to my job when I first started
@AusQuake
30 years ago. Gotta love a good smoked paper seismogram!
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