Seismology Research Centre
@earthquakes.au
2.5K followers 7 following 180 posts
Earthquake Observatory in Melbourne, Australia, monitoring events in the southeastern states. Seismograph manufacturer. Media contact: @SeisLOLogist
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earthquakes.au
42 earthquakes were detected in southeast Australia between the 18th and 28th of September 2025. The magnitude 4.4 near Strathgordon in Tasmania was the largest onshore earthquake in the state in over 20 years, when an M4.5 occurred at Cradle Mountain in November 2004.
earthquakes.au
Preliminary info: a magnitude 4.4 earthquake has occurred near Strathgordon in southwest Tasmania
earthquakes.au
Here are the 83 earthquakes detected from 1-17 September. NSW decided to host the M3+ events this time: two magnitude 3.7 earthquakes occurred 370km apart but within hours of each other, one near Nyngan, the other near Muswellbrook. An M3.1 then occurred 5 hours later 135km east near Bulahdelah NSW.
Reposted by Seismology Research Centre
seislologist.bsky.social
Is 200 earthquakes in just over a month normal for southeast Australia? It is, if your seismic network is dense enough and you’re dedicated to detailed data analysis. Staff at the Seismology Research Centre have manually located more than 35000 earthquakes over the last 50 years.
earthquakes.au
It's been a while, but we're back with our earthquake map! Here are the 213 events we detected from July 21 to August 31. The two largest were on Kangaroo Island in South Australia: a magnitude 3.6, followed by an M3.2 two weeks later. The other magnitude 3.0 was on Melbourne's Mornington Peninsula.
earthquakes.au
Did anyone in Sunbury feel this little earthquake just before 9pm?
earthquakes.au
A magnitude 3.0 earthquake occurred at 11:35am today on Kangaroo Island, South Australia. This follows a magnitude 3.6 that occurred on the island about 2 weeks ago.
Reposted by Seismology Research Centre
seislologist.bsky.social
#earthquake #gympie #queensland #brisbane
earthquakes.au
Preliminary info: magnitude 5.3 earthquake near Gympie in Queensland at 9:49am
earthquakes.au
A magnitude 2.9 earthquake occurred just off the east coast of Melbourne‘s Mornington Peninsula at 4:39am, near Flinders.
earthquakes.au
‪Actually, that’d be 1:02am Central Time…‬
earthquakes.au
A magnitude 3.4 earthquake occurred on Kangaroo Island in South Australia at 1:32am today. Report what you felt at earthquakes.ga.gov.au/feltreport
earthquakes.au
Seismosphere is a cloud-hosted data visualisation and seismic network management tool that we designed to run our observatory, and we’re proud to be able to help other organisations share their data using this user friendly platform.
seislologist.bsky.social
Some schools can get involved with Science Week by looking at their seismographs to see the magnitude 6.1 earthquake that occurred in West Papua an hour ago. There are about 50 schools across the country with an @auscope.bsky.social seismograph. Here's what they recorded, as seen on Seismosphere
earthquakes.au
Waves of Colour! There’s a new version of Waves coming that brings dark mode, amplitude based waveform colours, and 42 options for the spectrogram colour scheme. Waves is a free app anyone can use for waveform analysis and earthquake location and magnitude calculation. www.src.com.au/downloads/wa...
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seislologist.bsky.social
A colleague noticed this Facebook post about a massive rockfall in the Blue Mountains, so I looked at the overnight records to see if it was visible. The closest station was 30km away, and a spike in the spectrogram at 3:05am had me check other nearby stations, which all rumbled for about a minute.
earthquakes.au
NSW saw the largest earthquake last week: a magnitude 2.7 north of Lake Wyangala, along with a 2.2 near Cadia. Victoria had a little swarm near Kerang in the state's northwest, and a magnitude 2.5 tremor north of Moe, near the location of the magnitude 5.6 earthquake in June 2012.
earthquakes.au
Over a 5 day period, two earthquakes of magnitude 2.5 and one of magnitude 2.3 occurred near Cadia NSW. Another of magnitude 2.4 occurred near Tumbarumba in that state, and a magnitude 2.2 near the Qld border northeast of Mungindi rounds out the largest of the events from last week.
Reposted by Seismology Research Centre
seislologist.bsky.social
A magnitude 7 earthquake in Indonesia is rumbling across our network.
earthquakes.au
The largest of last week's 47 earthquakes was magnitude 3.2 that occurred north of Dubbo NSW. The state also hosted magnitudes 3.1 and 2.9 earthquakes minutes apart, occurring near the Qld border, south of Goondiwindi.
earthquakes.au
A little swarm of earthquakes occurred near the small network that we operate in Queensland. Over 30 earthquakes were detected in a 24 hour period last week.
earthquakes.au
A sparse week for earthquakes outside of SA - only 22 earthquakes detected in total. The largest was a magnitude 2.8 in NSW, located literally "Back O'Bourke". The other yellow dot is a magnitude 2.3 near Woods Point VIC, which still hasn't completely settled down almost 4 years after the big one.
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seislologist.bsky.social
Here’s another technical explainer video where I try to show how only 40% of the frequency of sampled seismic data represents the frequencies of the earth. Researching this helped me understand how alias frequencies masquerade in our data when they don’t actually exist, and why we need good filters.
earthquakes.au
Here’s the last 2 weeks of earthquakes in southeastern Australia. 103 in total: 9 in the M2 range, 51 in the M1 range, and 43 below M1. You can almost trace our mountain ranges with these plots, funnily enough.