Nice article about the quake off the coast of Japan and the subsequent advisory. 🧪

a man wearing a black shirt with the number 67 on it holds a microphone ALT: a man wearing a black shirt with the number 67 on it holds a microphone

I should known putting those numbers on the t-shirt was going to curse things…

At least it has meant that I’ve not been tied to the stand for once and been able to attend the sessions.
The rest of the gear is officially not coming in time, so it’s being redirected back to Australia. I have a plan to get the remaining shirts to @seismosocam.bsky.social delegates. Stay tuned!

Well, only half the t-shirts have arrived and just my neon sign - no banners or equipment! Anyhow, come and see me for Medium and larger shirts. Hopefully the rest turns up tomorrow #ssa2026

It fills me with pride to see our Waves software being used by the earthquake monitoring community for routine data analysis, education and outreach. There’s a great new visualisation feature coming soon, being previewed in my #ssa2026 talk at 16:45 today (ballroom A). See you there!

Let the presentations begin! @seismosocam.bsky.social #ssa2026

Lovely day in Pasadena. Pity my exhibit stuff has been stuck in customs in Memphis until this morning! Hopefully it’ll arrive in time to lob out this year’s t-shirts on Thu/Fri so I don’t have to send them home unloved…

You step out of the country for 1 day…

Every satellite is loaded with technology, so it’s only right that our largest satellite gets some new tech on board. A future Artemis mission will install seismometers on the moon to learn more about the internal lunar structure, and monitor how the surface behaves during moonquakes and impacts.

The whole of Australia sits with a tectonic plate, and within that plate there are faults - lines of weakness that can slip when the stress within the plate exceeds the friction locking the fault in place. There are several active faults near Melbourne. See neotectonics.ga.gov.au

Flashback to System 7 on the Macintosh in the early 1990s and our waveform app, SeisMac. You can still see elements of it in our current Waves app, even the channel display order of East, North, Up: as in X, Y, Z; like the axis directions on a graph.
What order do you think they should be displayed?

Seismology MegaQuake T-shirt - Seismology Research Centre Seismic band tour merch! The back lists the date, size and location of major earthquakes over the last century. Front says SEISMOLOGY in a thrash metal font

Did you want a MegaQuake T-shirt but the shipping's putting you off? Are you going to SSA? Buy now using coupon code ssa=pickup and I'll bring it over for you. Make sure you "Add to Cart" & go to the Checkout to enter the coupon code before paying. Offer ends Thursday! www.src.com.au/product/seis...

If a tree falls in the forest and no one is around to hear it, they should have been using a network of seismographs. This morning’s magnitude 5.5 in central Australia was south of Yulara on the NT-SA border.

Who’s going to Pasadena in a few weeks for the @seismosocam.bsky.social meeting? Asking for a friend. As in, I need friends to hang out with… 😶

Research-grade accelerometers need to capture signals from tiny local tremors while also recording massive magnitude 7 earthquakes that are a million times larger. But what does that mean in terms of physical ground motion?

Earthquake Magnitude and Intensity are two very different things, but both are useful measurements. I forgot to mention in the video the many different Intensity Scales (e.g. MMI, JMA, PEIS) as well as the different magnitude scales (e.g. ML, Mw, Ms, mb). No wonder people get the numbers confused!

Last night’s magnitude 4.4 earthquake near Boorowa NSW was the largest in the immediate area since a M5.0 in 1930 (the purple dot 15km to the south). That record was based on reports from the public, so there’s a higher uncertainty in location and magnitude compared to instrumentally recorded events

This has been felt strongly across Canberra and also felt in Sydney. The last significant earthquake in this area was a magnitude 4.1 in late 2022. The largest on record in the area was a magnitude 5.0 earthquake in 1930.

All buildings have a natural frequency of oscillation or resonance frequency. When seismic waves shake the ground beneath a building at its resonance frequency, the structure will begin to sway back and forth and the structural integrity of the building may become compromised.

Acceleration. The @f1tv.bsky.social Grand Prix in #Melbourne this weekend will see a lot of it, and it can be a big deal when earthquakes make big “g” numbers, but not every high peak acceleration is a problem. Duration of shaking is a big factor.

Farming town rattled by more than 70 'mysterious' earthquakes After a dozen earthquakes in a single day and more than 70 over the course of February, farmers in Gnowangerup are curious about what is rumbling their paddocks.

Definitely more than 70, but not all can be felt. GSWA field staff were easily feeling magnitude 2+ events while installing the seismographs. Nice to see the 24-hour "drum" image from the @earthquakes.au Seismosphere system featured. Data visualisation at its best!
www.abc.net.au/news/2026-02...

There is an active earthquake swarm near Gnowangerup in Western Australia. Here is the last 24 hours of recordings from one of GSWA's Rapid Deployment stations. Of yesterday's several hundred earthquakes, the largest on screen was only M2.5. A magnitude Mw5.0 earthquake occurred in this area in 2023

Watching it roll across our network on the @earthquakes.au YouTube live stream

70% of the buildings in the Central Business District of Christchurch had to be demolished after the magnitude 6.1 earthquake occurred under the city in 2011, only 6 months after a magnitude 7.1 that had occurred 40km away had already damaged buildings in Christchurch

Unfortunately that seems to be the case, and no doubt an issue in the country’s north.

I’m at a dam and climate conference in India, and I had never heard the acronym GLOF before, but it’s definitely the buzz word here.
We need more flowers at our meetings. It’s an impressive display, and rather calming.

2025 earthquake recap. Guess how many.
Interesting that Victoria’s largest earthquake was a single magnitude 3 earthquake last year. Remember only a few years ago when it seemed like Victorians were feeling an earthquake every few months? That’s the dynamic earth for you.

It’s the 50th anniversary of @earthquakes.au and it all started when I was 5 years old with a magnitude 1.4 near my house. How cute was I?
Congratulations to everyone who has contributed to the success of the SRC over the decades, and to those taking Australian seismology into the future.

Abstracts are closing in the next 24 hours, so join our “Seismology for All” session to raise awareness for tools and initiatives that might help those getting into our branch of STEM - excuse the unintentional botanical pun 🪾🍃

Do you just mean hardware costs? I would have thought staff time and travel costs would often outweigh the cost of the hardware on a lot of projects.