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John Cassidy @earthquakeguy.bsky.social · 29/09/2026

Did you feel shaking in the #PugetSound region of #WA state at 2:05 p.m. PT today? That was a M4.2 #earthquake located ~40 km SW of Seattle. 1000's of people felt shaking, some as far away as Victoria and Vancouver in the north, and Portland in the south USGS: earthquake.usgs.gov/earthquakes/... ⚒️🧪

Seismograms showing ground shaking from the September 29, 2026 M4.2 earthquake near Seattle and Tacoma, WA.

Map from the USGS showing felt shaking reports received for the M4.2 earthquake near Seattle and Tacoma on September 29 at 2:05 p.m. Some people felt shaking as far away as Victoria and Vancouver, British Columbia and Portland, Oregon.

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John Cassidy @earthquakeguy.bsky.social · 28/09/2026

A trio of earthquakes (M4.9-5.4) struck ~120 km off northern Vancouver Island during the past 18 hours. These were too far offshore to have any impacts - but good reminders that this is an active earthquake zone. Details: www.earthquakescanada.nrcan.gc.ca/index-en.php ShakeOutBC www.shakeoutbc.ca ⚒️🧪

Seismogram showing the three M4.9-5.4 earthquakes (during the past 18 hours) located ~120 km west of northern Vancouver Island. Several smaller earthquakes can be seen as well. This 24-hour plot is from the Earthscope Consortium website.

A map showing the tectonic plates offshore of Vancouver Island as well as the location of the three M4.9-5.4 earthquakes that have occurred during the past 18 hours.

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John Cassidy @earthquakeguy.bsky.social · 28/09/2026

From above and below… I took a photo of the seaplane that my son was flying on today as he passed over our house… at the same time he was looking down and taking a photo of our house from above… #VancouverIsland 🇨🇦📷

Photo taken from a seaplane flying over Cordova Bay. Blue ocean, green trees and in the distance, the Olympic Mountains.

Photo of the seaplane flying over Cordova Bay. Blue sky and green Douglas Fir trees..

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John Cassidy @earthquakeguy.bsky.social · 20/09/2026

As summer winds down, fog season gets closer…

Short-lived late-September fog on southern #VancouverIsland. Green bushes and trees in the mist as the sun rises.

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John Cassidy @earthquakeguy.bsky.social · 17/09/2026

Did you feel shaking in the #Kootenay region of southeastern British Columbia at 5:31 PT this morning? Hundreds did... That was a M4.0 earthquake located 40 km ENE of Nelson. Felt from Trail to Creston to Cranbrook. Details and to report shaking: www.earthquakescanada.nrcan.gc.ca/eqpages/en/2... ⚒️🧪🇨🇦

Map showing the location of the 17 September, 2026 M4 earthquake near Kootenay Lake in southeast British Columbia.

Seismograms showing ground shaking from the 17 September, 2026 M4 earthquake near Kootenay Lake, British Columbia.

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John Cassidy @earthquakeguy.bsky.social · 06/09/2026

Parsley, sage, rosemary and thyme (sounds like a song?)… Anything being watered (like the herb garden) is very happy… anything not being watered (like the lawn) is a lovely brown colour. 🌱🇨🇦

Photo of herb garden, with a brown lawn in the background.

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John Cassidy @earthquakeguy.bsky.social · 05/09/2026

5 Sept. 1944: A damaging M5.8 #earthquake struck near Cornwall, #ON and Massena, #NY. Chimneys came crashing down and many masonry structures were damaged. Felt from Quebec City to New York to Toronto ⚒️🧪 www.earthquakescanada.nrcan.gc.ca/historic-his... articles.adsabs.harvard.edu/pdf/1945JRAS...

Map showing the shaking intensity from the September 5, 1944 M5.8 earthquake near Cornwall, Ontario and Massena, New York. Ground shaking was felt from Quebec City to New York City and from Toronto to Boston.

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John Cassidy @earthquakeguy.bsky.social · 03/09/2026

128 years of #earthquake recording in Victoria, Canada! On September 3, 1898, a Milne seismograph began operation in the basement of the old Customs House building on the Victoria waterfront. It was one of the first seismographs in Canada ⚒️🧪🇨🇦 Coverage from a few years ago cheknews.ca/earthquake-h...

Photo showing the Milne seismograph that was first deployed in Victoria, Canada, in 1898.

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John Cassidy @earthquakeguy.bsky.social · 01/09/2026

Welcome to #September - when my #VancouverIsland lemon tree still has lots of ripe lemons from this past Spring but also many new lemons that will be ready to pick in 2027! #Lemons 🌱🍋🇨🇦

Photo of an in ground Canadian lemon tree on the sunny south wall of a house. Ripe, bright yellow lemons and green leaves.

Close-up of ripe lemons (and green leaves) on a Vancouver Island lemon tree.

Close-up of new, green lemons and green leaves on a Vancouver Island lemon tree.

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John Cassidy @earthquakeguy.bsky.social · 29/08/2026

Natural Resources Canada is hiring: Field Electronics Technologist - Closing Sept. 17, 2026 Victoria, BC; Yellowknife, NT or Ottawa, ON emploisfp-psjobs.cfp-psc.gc.ca/psrs-srfp/ap... Seismic Analyst - closing Sept.9, 2026 Victoria, BC or Ottawa, ON emploisfp-psjobs.cfp-psc.gc.ca/psrs-srfp/ap... ⚒️🧪🇨🇦

emploisfp-psjobs.cfp-psc.gc.ca

Field Electronics Technologist

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John Cassidy @earthquakeguy.bsky.social · 22/08/2026

77 years ago tonight - a M8.1 #earthquake off #HaidaGwaii ruptured a 500-km-long segment of the Queen Charlotte Fault ("Canada's San Andreas Fault"). The average slip along the #fault was ~5 m. Shaking was so strong that it was hard to stand. More than 100 aftershocks were felt on Haida Gwaii. ⚒️🧪🇨🇦

Map showing the location of the M8.1 earthquake of 1949 and the M7.8 earthquake of 2012. The rupture zone of the 1949 earthquake (shown on the map) extended for about 500 km along the Queen Charlotte Fault. The 2012 earthquake was a subduction earthquake on the Haida Gwaii Thrust fault.

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John Cassidy @earthquakeguy.bsky.social · 21/08/2026

August 21, 1949 - a damaging M8.1 #earthquake (one of the largest ever recorded in North America) struck off #HaidaGwaii. Shaking was so strong that it was hard to stand. Felt across most of #BritishColumbia, parts of Alberta, WA, Yukon and Alaska www.earthquakescanada.nrcan.gc.ca/historic-his... ⚒️🧪

Map showing the location of the 1949 M8.1 Haida Gwaii earthquake. Colours indicate the felt shaking and the strength of shaking. Shaking was so strong on parts of Haida Gwaii that it twas difficult to stand.

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John Cassidy @earthquakeguy.bsky.social · 19/08/2026

Did you feel shaking in the Okanagan Valley region last night at 11:17 p.m.? That was a M2.9 earthquake located 29 km SE of #Penticton. Shaking was felt from Kamloops, through the Okanagan Valley to Osoyoos. For details and to report shaking: www.earthquakescanada.nrcan.gc.ca/eqpages/en/2...

Map of southern British Columbia showing the location of last night's M2.9 earthquake (south of Penticton) and coloured symbols indicatethe strength of shaking. In all cases, weak shaking levels.

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John Cassidy @earthquakeguy.bsky.social · 13/08/2026

Did you feel shaking in northern #California at 8:30 this morning? That was a M4.1 earthquake near San Leandro (about 20 km to the east of San Francisco). Shaking was felt by thousands of people in the Bay area. Details (USGS) and to report shaking: earthquake.usgs.gov/earthquakes/...

Map from the USGS showing felt ground shaking in northern California from the M4.1 earthquake near San Leandro, CA on August 13 (08:30 a.m. PDT). Different colours are used to indicate the strength of shaking.

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John Cassidy @earthquakeguy.bsky.social · 06/08/2026

What happens when you forget about tides? This boat will be high and dry for many hours. Here on the east coast of #VancouverIsland, the ocean recedes by up to 1 km, providing a great sandy beach… perfect for a hot summers day. 🧪🏖️🇨🇦

Photo of a beach on theceast coast of Vancouver Island at low tide. The ocean has receded by 1 km.

Close up of a small boat stranded by the low tide

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Reposted by John Cassidy

Dr. Heather McFarlin @volcanoheather.bsky.social · 05/08/2026

Pleqse share!! Postdoc opportunity for near-real-time landslide detection in Alaska!!! The successful applicant will get to work with the amazing @ezgikarasozen.bsky.social See this page for more info! earthquake.alaska.edu/job-opportun... 🪨⚒️🧪

earthquake.alaska.edu

Job Opportunities | Alaska Earthquake Center

The Earthquake Center’s success is built through the collaboration of people with different specialties. Our team includes scientists, technicians, engineers, communications professionals, IT speciali...

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John Cassidy @earthquakeguy.bsky.social · 04/08/2026

Room with a view… From the beaches of central #VancouverIsland looking east across the #SalishSea to the Sunshine Coast and the beautiful Coast mountains. 🇨🇦📸⛰️

View from central Vancouver Island across the Salush Sea to the green hills of the Sunshine Coast and the snow-capped Coast Mountains.
Branches of a pine tree in the foreground.

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John Cassidy @earthquakeguy.bsky.social · 02/08/2026

The beautiful snow-capped #volcano Kweq'Smánit (Mt. Baker) as seen from Cordova Bay on southern #VancouverIsland (120 km away) on July 31st. 🌋🧪⚒️📷

This photo shows the snow-capped volcano, Kweq'Smánit (Mt. Baker) as seen from Vancouver Island (120 km away). Also - the blue waters of the Salish Sea, the green hills of San Juan Island and a large green Douglas Fir tree in the foregound.

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John Cassidy @earthquakeguy.bsky.social · 01/08/2026

Did you feel a slight shake in the #VancouverIsland region last night (at 9:49 p.m.)? That was a M5.5 earthquake located ~140 km off the northwest coast of the island. Details: www.earthquakescanada.nrcan.gc.ca/eqpages/en/2... Report shaking: www.earthquakescanada.nrcan.gc.ca/dyfi-lavr/fo... ⚒️🧪

Recording of ground shaking at Victoria caused by the M5.5 offshore Vancouver Island earthquake (460 km away).

Map showing the location of last night's M5.5 earthquake off northern Vancouver Island. Thin blue lines indicate tectonic plate boundaries.

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John Cassidy @earthquakeguy.bsky.social · 24/07/2026

Wow - this short-lived, surprise storm on southern #VancouverIsland produced some very loud thunder and very nearby lightning. One flash and very loud bang were almost simultaneous and our house shook for many seconds - as recorded on the seismograph at 5:12 p.m. today. 🧪

Ground shaking at our house resulting from a nearby lightning strike!

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John Cassidy @earthquakeguy.bsky.social · 15/07/2026

Oh great… my garden has been turned into a “bed and breakfast” by a peafowl. Last night, this peahen dug up my yellow bean plants to make herself a nest in a raised garden bed. All that was visible was her head and it took a quite a lot of convincing to get her to leave. 🌱🦚

Photo of a peahen who has made a nest in a garden box. Tomato plants ( for snacking on) are behind.

Photo of the peahen leaving its new home in a garden box. Green plants and brown lawn in the photo.

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John Cassidy @earthquakeguy.bsky.social · 14/07/2026

Interesting... there are peanut plants popping up in my garden. Are squirrels smarter than I thought? Are they thinking that for every peanut they plant in the garden, they could get a return of 50 to 150 peanuts?? 🌱

Photo of a squirrel sleeping on a fence in the sun.

Photo of peanut plants that have started growing in my garden.

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John Cassidy @earthquakeguy.bsky.social · 12/07/2026

I am starting to think that it was not the best idea to grow zucchini plants in a garden box… 🌱

Photo of very large zucchini plants in a relatively small planter box. Large green leaves and a green cedar hedge in the background.

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John Cassidy @earthquakeguy.bsky.social · 01/07/2026

Happy #CanadaDay! 41.4 million people 9.9 million km² (2nd largest country in the world) Enjoy the day! #VancouverIsland 🇨🇦

Brown grass, green trees, blue water, blue sky and snow-capped mountains in the distance, as seen from Fort Rodd Hill on southern Vancouver Island, Canada.

Red and white Canadian flag with a blue sky behind.

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John Cassidy @earthquakeguy.bsky.social · 30/06/2026

For my Bluesky friends who are interested in Episodic Tremor and Slip (ETS) - and specifically, the question “Does Episodic Tremor and Slip Influence Seismicity in Northern Cascadia?” - see the Seismica article (4th PhD article of Dr. Madison Bombardier) seismica.library.mcgill.ca/article/view... ⚒️🧪

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John Cassidy @earthquakeguy.bsky.social · 29/06/2026

‘Tis the season… the sweet scent of Jasmine. #June on #VancouverIsland 🇨🇦🌱

Photo of jasmine in bloom. Green leaves and white star shaped blossoms.

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John Cassidy @earthquakeguy.bsky.social · 24/06/2026

June 24, 1997: a M4.6 #earthquake struck beneath the Strait of Georgia, midway between #Vancouver and #Nanaimo. It was felt across southwest British Columbia, knocked items from shelves and caused minor damage. It was followed by 100+ aftershocks and preceded by a M3.4 foreshock. ⚒️ 🧪

Map showing the location of the June 24, 1997 M4.6 earthquake. It was beneath the Strait of Georgia between Vancouver and Nanaimo and shaking was felt across much of southwest British Columbia.

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John Cassidy @earthquakeguy.bsky.social · 23/06/2026

23 June 1946 - Canada’s largest recorded #earthquake beneath land (M7.3) rocked central #VancouverIsland. 100’s of landslides triggered, chimneys collapsed + broken windows. Shaking was felt from Oregon to Prince Rupert to the Alberta border. ⚒️🧪 www.earthquakescanada.nrcan.gc.ca/historic-his...

Map showing the location of the M7.3 earthquake central Vancouver Island earthquake of June 23, 1946 and the felt shaking pattern. Strong and damaging shaking occurred on central Vancouver Island, and shaking was felt as far away as Portland, Oregon, Prince Rupert and the Rocky Mountains.

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John Cassidy @earthquakeguy.bsky.social · 21/06/2026

Always a fun trip by seaplane from #Victoria to #Vancouver, but especially when going to a #WorldCup match. #Egypt vs #NewZealand 🇨🇦

Photo of Vancouver from a seaplane. Lots of boats and highrises.

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John Cassidy @earthquakeguy.bsky.social · 20/06/2026

Seeing red on Vancouver Island… Raspberries, roses and strawberries! #Victoria 🇨🇦🌱📸

Photo of fresh picked red raspberries and strawberries with a backdrop of red roses on southern Vancouver Island, Canada.

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John Cassidy @earthquakeguy.bsky.social · 18/06/2026

Did you feel shaking in eastern #Québec or #NewBrunswick at 10:21 a.m. ET today? That was a M4.4 #earthquake that was felt by thousands from Québec City to Moncton. No reports of damage. Details and to report shaking: www.earthquakescanada.nrcan.gc.ca/eqpages/en/2... ⚒️🧪🇨🇦

Seismograms showing ground shaking from today's M4.4 earthquake in eastern Quebec.

Map showing how ground shaking was felt in Quebec and New Bruswick from this morning's M4.4 earthquake. Mild shaking was reported by more than 1000 people from Quebec City to Moncton, NB.

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John Cassidy @earthquakeguy.bsky.social · 08/06/2026

Did you feel the ground shake in #Florida just after 2 p.m. ET? That was a M6.1 #earthquake that occurred ~100 km NW of #Cuba. It was felt from Cuba to Florida to Mexico. earthquake.usgs.gov/earthquakes/... No tsunami expected: www.tsunami.gov Report shaking: earthquake.usgs.gov/earthquakes/...

USGS map showing felt ground shaking from a M6.1 earthquake near northwest Cuba. Map shows how shaking was felt across the region.

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John Cassidy @earthquakeguy.bsky.social · 04/06/2026

A brief shower at sunset last night produced this beautiful #rainbow over the Salish Sea. #VancouverIsland 🇨🇦🌈📷

Photo of a rainbow that extends to the Salish Sea. Tall, green Douglas Fir trees on one side and distant islands in the background.

Photo of a rainbow that extends to the Salish Sea. Tall, green Douglas Fir trees on both sides.

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John Cassidy @earthquakeguy.bsky.social · 03/06/2026

The most wonderful time of the year! It is lemon blossom season on Vancouver Island, and the air is filled with the beautiful scent of #lemon blossoms! My 5-year-old in-ground tree still has a dozen ripe lemons on it, and it should produce about 50 lemons this year… #VancouverIsland 🇨🇦 🌱🍋

Photo of a lemon tree on southern Vancouver Island. Lush green foliage, yellow lemons, white blossoms, and a house that need to be stained in the background.

Photo of bright yellow lemons ready to pick. Green leaves in the background.

A close-up of a lemon blossom (one of 100+) with green leaves surrounding.

Close-up photo of some lemons ready to pick. Green leaves in the background.

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John Cassidy @earthquakeguy.bsky.social · 23/05/2026

It is always great to visit beautiful and historic Québec City. It is almost like visiting old cities in Europe without having to travel across the Atlantic. 🌱📷

View of the old hotel Chateau Frontenac as seen from the Citadel.

One entrance to the walled portion of old Québec City.

Beautiful.colourful tulips in bloom in Québec City.

View of old homes in Quebec City as seen from the Citadel. Green grass, blue skies and white fluffy clouds.

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John Cassidy @earthquakeguy.bsky.social · 16/05/2026

May 16, 1976: a M5.4 #earthquake struck 60 km beneath Pender Island - a reminder that southwest #BritishColumbia is an active earthquake zone. High-rises in #Vancouver swayed for up to 30 s, windows broke in White Rock, and some power outages. www.seismescanada.rncan.gc.ca/pprs-pprp/pu...

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John Cassidy @earthquakeguy.bsky.social · 12/05/2026

Did you feel shaking on #HaidaGwaii at 1:35 p.m. today? That was a M4 #earthquake located off the east coast, 31 km from Daajing Giids and 37 km from Port Clements. Details: www.earthquakescanada.nrcan.gc.ca/recent/2026/... Please report shaking: www.earthquakescanada.nrcan.gc.ca/dyfi-lavr/fo... ⚒️🧪

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John Cassidy @earthquakeguy.bsky.social · 29/04/2026

April 29, 1965 (at 8:29 am): A damaging M6.7 #earthquake struck ~60 km beneath Seattle, rocking western #WA and southwestern #BritishColumbia. This was a deep quake - see type 2 in: earthquakescanada.nrcan.gc.ca/pprs-pprp/pu... Large, deep, damaging earthquakes also occurred here in 1949 and 2001.

A cartoon map showing the plate tectonics os western Washington State and southwestern British Columbia and the location of the damaging M6.7 earthquake of 29 April, 1965.

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John Cassidy @earthquakeguy.bsky.social · 25/04/2026

The amazing citrus scent of Mexican Orange blossoms (Choisya ternate) fills the April air. This will bloom again in October. #VancouverIsland #blossoms 🌱🇨🇦

White and yellow Mexican Orange blossoms with green leaves and blue skies in the background.

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John Cassidy @earthquakeguy.bsky.social · 23/04/2026

Tonight’s Earth Day dinner included fresh picked (today) beets from the winter garden and sautéed beet tops cooked with a lemon from the backyard tree and garlic from last summers harvest. All delicious and all very, very local. #VancouverIsland #GrowLocal #EarthDay 🌱🇨🇦🌎

Beets, arugula, Swiss chard and green growing in the winter garden.

Green beet tops and yellow lemons on a brownish countertop.

Bright yellow lemons and green leaves on the backyard lemon tree.
UV

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John Cassidy @earthquakeguy.bsky.social · 14/04/2026

Did you feel shaking in Ontario or West Quebec today at 12:36 p.m. ET? That was a M3.7 #earthquake located ~60 km NW of #Ottawa. Felt over a wide area, from Toronto to Montreal. Details and report shaking here: www.earthquakescanada.nrcan.gc.ca/recent/2026/... ⚒️

earthquakescanada.nrcan.gc.ca

Earthquake Details (2026-04-14)

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John Cassidy @earthquakeguy.bsky.social · 14/04/2026

April 13, 1949 - a damaging M6.7 earthquake near Olympia and #Seattle, WA rocked the Pacific Northwest and southwest #BritishColumbia. Deep earthquakes (within the subducting oceanic plate at ~40-60 km depth) are the most frequent source of damaging #earthquakes here. crew.org/wp-content/u... ⚒️🧪

Cartoon showing the plate tectonics (subduction zone) of southwest British Columbia and Washington State. The location of the deep, 13 April, 1949 M6.7 earthquake near Seattle and Olympia is also shown.

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John Cassidy @earthquakeguy.bsky.social · 13/04/2026

It is Tsunami Preparedness Week (April 12-18) in #BritishColumbia. If you live (or visit) here, or anywhere in the world where tsunamis occur, see some great information on tsunamis and preparedness: - www2.gov.bc.ca/gov/content/... - bcearthquakealliance.ca/tsunami-prep... #TsunamiPreparedness 🧪⚒️🌊

Photo of a blue and white Tsunami Evacuation sign on the west coast of Vancouver Island. Green forest in the background.

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John Cassidy @earthquakeguy.bsky.social · 11/04/2026

Well, well, well... the peahen that moved into the neighbourhood is now feasting on the last of my winter garden vegetables (lettuce, arugula and beets). Even better, she gets up at 5:30 a.m. sharp and tries to awaken everyone in the area. 🌱🦚

Photo of a peahen sitting on a brown fence.

Photo of a peahen in a raised garden with beets, arugula dn lettuce on the menu. Green grass and a cedar fence in the background.

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John Cassidy @earthquakeguy.bsky.social · 10/04/2026

April 12-18 is #TsunamiPreparednessWeek in British Columbia - a great time to learn more about the past and prepare for the future, starting with stories and lessons passed down from those who have lived on this coast for 1000’s of years hakaimagazine.com/features/gre... from @hakai.org magazine 🧪⚒️🌊

hakaimagazine.com

The Great Quake and the Great Drowning | Hakai Magazine

Mega-quakes have periodically rocked North America’s Pacific Northwest. Indigenous people told terrifying stories about the devastation but refused to leave.

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John Cassidy @earthquakeguy.bsky.social · 28/03/2026

#Tsunami impacts in #BritishColumbia from the M9.2 March 27, 1964 Alaska earthquake? Maximum wave heights (1st not the largest): Port Alberni: ~7m Tofino: 2.4m Victoria: 1.4m Vancouver: 0.3m www.portalbernimaritimeheritage.ca/post/2018/08... Original news coverage: www.cbc.ca/player/play/... 🌊🧪

portalbernimaritimeheritage.ca

The Great Tsunami of 1964

Tsunamis have been cursing our worlds waters for the past 8,000 years but no one ever worried that one of these alarming waves would reach the small town of Port Alberni. Tsunamis can threaten us, our...

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John Cassidy @earthquakeguy.bsky.social · 27/03/2026

March 27, 1964 - a M9.2 subduction #earthquake struck southern #Alaska. Shaking was felt across much of #BritishColumbia and Yukon and the resulting #tsunami caused damage in some coastal BC communities. Details (USGS): earthquake.usgs.gov/earthquakes/... Video: www.youtube.com/watch?v=L6TB... ⚒️🧪🌊

Map showing the location and rupture area of the March 27, 1964 M9.2 Alaska earthquake.

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John Cassidy @earthquakeguy.bsky.social · 18/03/2026

Camellia Japonica Late winter, #VancouverIsland 🇨🇦 🌱

Large pink blossoms of Camellia japonica with dark green leaves in the background.

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