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John Cassidy

@earthquakeguy.bsky.social

5.2K followers 840 following 830 posts

NRCan earthquake seismologist + University of Victoria Adjunct Professor. Works with engineers, emergency managers, and communities to help minimize the impact of #earthquakes. Also, posts on Nature and Gardening (Zone 9a). 🌱 🧪⚒️ 🏞 🇨🇦 My thoughts/posts.

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John Cassidy @earthquakeguy.bsky.social · 3h

The best outcome of the Hector Mine earthquake!

John Cassidy @earthquakeguy.bsky.social · 4h

Thanks. The image is from the Pacific Northwest Seismic Network - you can find the "tremor map" at:
www.pnsn.org/tremor
You can plot tremors day by day, or select a time window, region, etc. It is a great tool!

Tremor Map | Pacific Northwest Seismic Network

www.pnsn.org

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John Cassidy @earthquakeguy.bsky.social · 4h

Right on schedule! More than 10,000 tiny tremors (not felt) have rolled through #PugetSound and southern #VancouverIsland over the past 30 days. This is Episodic Tremor and Slip (ETS) and occurs here every 12-16 months:
www.earthquakescanada.nrcan.gc.ca/pprs-pprp/pu...
Also - it is #ShakeOut day!
⚒️🧪

Map of the Puget Sound and Vancouver Island region showing the location of tiny ETS tremors (not earthquakes and not felt) from September 15 - October 15. Locations are colour-coded by time.

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John Cassidy @earthquakeguy.bsky.social · 17h

Ha - yes, very strange!
Regardless of who wins tonight, we both have ShakeOut tomorrow - that is a big win for all of us! Cheers!

John Cassidy @earthquakeguy.bsky.social · 17h

Hate to ask... but any more good home run signals to show us???
🇨🇦💙🐦
@haroldtobin.bsky.social

John Cassidy @earthquakeguy.bsky.social · 20h

Are you ready for the #ShakeOut drill tomorrow (10:16 a.m. Oct. 16th)?
Do you want to learn more about #earthquakes and #tsunamis?
Bring your questions and join us this evening at 7 p.m. PT for our free Webinar and Q+A session.
Register:
us02web.zoom.us/webinar/regi...
@shakeoutbc.bsky.social
⚒️🧪🇨🇦

Image of a poster highlighting this evening's Earthquake Webinar and question and answer session as a part of ShakeOut week.

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John Cassidy @earthquakeguy.bsky.social · 1d

Thank you!

John Cassidy @earthquakeguy.bsky.social · 2d

Not a bad view from the office today...
🧪⚒️🇨🇦
#VancouverIsland
#yyj

View of maple trees with beautiful red leaves set against the blue sky. The blue waters of Patricia Bay are visible, with the hills of Salt Spring Island in the distance.

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John Cassidy @earthquakeguy.bsky.social · 2d

Thanks, Dr. Willoughby! There is also a great article on Alice Wilson in the journal Earth Sciences History:
pubs.geoscienceworld.org/hess/earth-s...
⚒️🧪🇨🇦

ALICE WILSON, FIRST WOMAN GEOLOGIST WITH THE GEOLOGICAL SURVEY OF CANADA | Earth Sciences History | GeoScienceWorld

ABSTRACT. Alice Evelyn Wilson (1881–1964) was the first woman to be employed in a professional capacity by the Geological Survey of Canada. Though from an

pubs.geoscienceworld.org

John Cassidy @earthquakeguy.bsky.social · 2d

Some mid-October beach therapy.
southern #VancouverIsland.
#Victoria
#beach
🇨🇦 📷

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John Cassidy @earthquakeguy.bsky.social · 7d

Thank you, Julian.

John Cassidy @earthquakeguy.bsky.social · 7d

Thanks, Tim! He was a great dog, and we were fortunate that he spent more than 15 years with us. English Setters are so kind, gentle, and loyal. Thanks again.

John Cassidy @earthquakeguy.bsky.social · 7d

Thank you, and yes, absolutely, a good loyal friend.

John Cassidy @earthquakeguy.bsky.social · 7d

Thank you.

John Cassidy @earthquakeguy.bsky.social · 8d

Thank you. It sure is too short...

John Cassidy @earthquakeguy.bsky.social · 8d

Thank you - yes, such a sad day, and a huge gap to deal with.

John Cassidy @earthquakeguy.bsky.social · 8d

Thank you.

John Cassidy @earthquakeguy.bsky.social · 8d

Oh Winston, our hearts are broken. We are so grateful for the 15+ years that you spent with us. Thank you for the many (many!) 1000's of walks and hikes. Thank you for always being there and for always watching out the window for our return, then greeting us at the door. Miss you forever
#Dogs
#Love

Photo of a young Winston, our black, white and tan English setter, sitting out on the deck. Green grass in the background.

Photo of Winston, at about 5 years of age, relaxing on a lounge chair on the deck, soaking up the sun.

A close-up photo of Winston lying on the carpet, relaxing.

Photo of a 15+ year-old Winston sitting on his brown chair in the window watching for our return.

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John Cassidy @earthquakeguy.bsky.social · 11d

It is nice to see the tall, pampas grass plumes return. They are beautiful - until the rains begin in November! Enjoy while they are here...
🌱📷

Photo of tall, white plumes of pampas grass. Green leaves below, and a tall green cedar tree behind.

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John Cassidy @earthquakeguy.bsky.social · 17d

Great question! I didn't know until this year...
They look like watermelons but are about the size of your thumb. They taste like a cross between a pickle and a cucumber. Very tasty!

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John Cassidy @earthquakeguy.bsky.social · 17d

September may be winding down, but my #VancouverIsland garden sure isn't! Just picked - green beans, yellow beans, cucumbers, beets, snap peas, cucamelons, apples, lemons and tomatoes... so many tomatoes! Lots of kale, spinach, arugula and lettuce planted for the Fall and Winter. 🌱🇨🇦

Photo of fresh-picked tomatoes, beets, yellow and green beans, cucumbers, apples, lemon, snap peas and cucamelons ( that look like tiny watermelons).

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John Cassidy @earthquakeguy.bsky.social · 23d

Great question! I don't know, but will try to find the answer! It could be that it indicates a "significant" or "protected" tree.

John Cassidy @earthquakeguy.bsky.social · 23d

On #VancouverIsland you don't have to go far to find trees that are perfect for #ThickTrunkTuesday
This is a large Douglas Fir in #Victoria. 🌱📸🌲
#Photography
#Trees
#Canada

Photo of a large Douglas Fir tree on southern Vancouver Island.

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John Cassidy @earthquakeguy.bsky.social · 26d

For my friends in #Washington #Oregon and northern #California - a great summary of #earthquake hazards and probabilities for the three types of earthquakes in #Cascadia has been released by the USGS:
pubs.usgs.gov/publication/...
note that this also applies to southern #BritishColumbia.
⚒️🧪

USGS Publications Warehouse

Earthquakes and their cascading consequences pose a significant threat to the people, environment, infrastructure, and economy of the U.S. Pacific Northwest. The Pacific Northwest is susceptible to th...

pubs.usgs.gov

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John Cassidy @earthquakeguy.bsky.social · 26d

It is great to see you back here!