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Posts by John Cassidy

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

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

Green beet tops and yellow lemons on a brownish countertop.

Green beet tops and yellow lemons on a brownish countertop.

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

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

Tonightโ€™s Earth Day dinner included fresh picked (today) beets from the winter garden and sautรฉed 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
๐ŸŒฑ๐Ÿ‡จ๐Ÿ‡ฆ๐ŸŒŽ

1 hour ago 5 0 0 0

Thanks. Yes, amazing, isn't it?

4 days ago 0 0 0 0

Yes, S waves are the strongest shaking and side to side. At M3.9 this earthquake produced stronger and longer duration shaking compared to smaller ones that feel like struck rumbling by!

1 week ago 2 0 1 0
Earthquake Details (2026-04-14)

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/...
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1 week ago 7 2 2 0
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.

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.

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...
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1 week ago 25 5 0 0

Thanks - another really good point - currents generated by tsunamis can be strong and erratic, so it is important to stay away from the water during these periods, as you did!

1 week ago 0 0 0 0

Thanks for this great reminder that tsunamis often continue for many hours - staying at high ground until there is an all-clear is so important!

1 week ago 0 0 0 0
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Thanks for sharing! How long did you have to stay up there before there was an "all clear" message?
I took this photo in Chile following the 2010 Maule earthquake and tsunami in a community that was hit so hard - but everyone survived as they were #prepared and knew exactly what to do + where to go.

1 week ago 3 0 1 0

A few things to know about #tsunamis:
- if you feel long and strong shaking (for a minute or more) - move to high ground.
- a tsunami is a series of waves that may last for many hours.
- the first wave may not be the largest
- check with your local community for tsunami hazard/preparedness info.
๐Ÿงช๐ŸŒŠโš’๏ธ

1 week ago 12 2 0 0
Photo of a blue and white Tsunami Evacuation sign on the west coast of Vancouver Island. Green forest in the background.

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

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
๐Ÿงชโš’๏ธ๐ŸŒŠ

1 week ago 19 9 1 2
Photo of a peahen sitting on a brown fence.

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.

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.

Photo of a peahen sitting on a brown fence.

Photo of a peahen sitting on a brown fence.

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.
๐ŸŒฑ๐Ÿฆš

1 week ago 14 0 1 0

It is a great article, isn't it? Many thanks to @hakai.org

1 week ago 0 0 0 0
The Great Quake and the Great Drowning | Hakai Magazine Mega-quakes have periodically rocked North Americaโ€™s Pacific Northwest. Indigenous people told terrifying stories about the devastation but refused to leave.

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 1000โ€™s of years
hakaimagazine.com/features/gre...
from @hakai.org magazine
๐Ÿงชโš’๏ธ๐ŸŒŠ

1 week ago 19 7 0 1
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Journal of Geophysical Research: Solid Earth: Vol 131, No 4 <em>Journal of Geophysical Research: Solid Earth</em> is a premier AGU geophysics journal, publishing research articles from across the Earth sciences that significantly advance the field.

Great question! That appears to be the cover photo for the recent issue of JGR-Solid Earth: agupubs.onlinelibrary.wiley.com/toc/21699356...

2 weeks ago 0 0 1 0
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Holocene Normal Faulting in the Southern Rocky Mountain Trench; Orogenic Collapse Modulated by Glacial Unloading? 3.6ย km-long fault scarp identified cross-cutting Holocene paraglacial fan along Southern Rocky Mountain Trench Normal kinematics inferred from electrical resistivity tomography may be related to ...

Old faultsโ€ฆ new tricks.
Dr. Theron Finley used a variety of new datasets to study an old #Fault in the southern Canadian Cordillera
Congratulations @theronfinley.bsky.social on your outstanding PhD research that has improved seismic hazard estimates
agupubs.onlinelibrary.wiley.com/doi/full/10....
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2 weeks ago 23 5 1 2
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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...

#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/...
๐ŸŒŠ๐Ÿงช

3 weeks ago 18 2 0 0

Thanks for sharing. Such a tragic event.

3 weeks ago 1 0 0 0

Thanks for sharing.

3 weeks ago 1 0 0 0
Map showing the location and rupture area of the March 27, 1964 M9.2 Alaska earthquake.

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

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...
โš’๏ธ๐Ÿงช๐ŸŒŠ

3 weeks ago 29 9 2 1

Thanks, Brent! You continue to inspireโ€ฆ

4 weeks ago 1 0 1 0

Wow! Amazing...

1 month ago 1 0 0 0
Large pink blossoms of Camellia japonica with dark green leaves in the background.

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

Camellia Japonica
Late winter, #VancouverIsland ๐Ÿ‡จ๐Ÿ‡ฆ
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1 month ago 14 0 0 0

Spectacular!

1 month ago 1 0 0 0
Photo of he 6th century monastic ruins of Devenish Island date. Green grass, overcast skies and grey stone ruins.

Photo of he 6th century monastic ruins of Devenish Island date. Green grass, overcast skies and grey stone ruins.

Photo of a round tower and 6th century monastic ruins of Devenish Island date. Green (grass) and grey (sky and ruins).

Photo of a round tower and 6th century monastic ruins of Devenish Island date. Green (grass) and grey (sky and ruins).

Happy #StPatricksDay โ˜˜๏ธ everyone!
If you have an opportunity to visit the beautiful island of #Ireland ๐Ÿ‡ฎ๐Ÿ‡ช - donโ€™t miss that opportunity! I took these photos on Devenish Island - the ancestral "epicentreโ€ of the #Cassidy clan for nearly 1000 years. cassidyclan.org
๐Ÿ“ทโ˜˜๏ธ

1 month ago 11 1 0 0
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Hi Brent, good question. The signal at ~13:36 (06:36 PDT) is interesting, and there are smaller ~similar waveforms at 12:54, 13:15 and 13:42 on the seismogram. The signal at 12:28 that has a sharper arrival and coda is probably the P-wave from a M5.2 earthquake near Taiwan about 13 minutes earlier.

1 month ago 1 0 0 0

In case this is helpful or of interest to others.
Recordings from NRCan seismic station WSLR for March 11-12, 2026.
@mabrideau.bsky.social
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to access NRCan seismic data: www.earthquakescanada.nrcan.gc.ca/fdsnws/

1 month ago 5 0 0 0
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Part of Whistler ski resort closed following Thursday morning rockslide | CBC News Whistler Blackcomb owner Vail Resorts says the rockslide happened before the ski resort opened and that no one was injured.

Pretty big slide in Whistler!

www.cbc.ca/news/canada/...

1 month ago 9 5 1 0
A plot of seismic data for station WSLR covering the period 5 p.m. PDT March 11 (00 UTC March 12) through March 12. Very noisy signals due to high winds.

A plot of seismic data for station WSLR covering the period 5 p.m. PDT March 11 (00 UTC March 12) through March 12. Very noisy signals due to high winds.

A filtered version of the WSLR seismic data for March 11 - 12 showing some small shaking signals in the overnight hours.

A filtered version of the WSLR seismic data for March 11 - 12 showing some small shaking signals in the overnight hours.

Hi Brent. Here is the seismogram recorded at WSLR. for March 11-12, 2026. Very noisy (unfiltered on left) thanks to high winds. Filtered (1 Hz high-pass) shows a few small potential signals in the overnight hours. These 24-hour seismic plots thanks to @earthscope.org
www.iris.edu/app/station_...
โš’๏ธ๐Ÿงช

1 month ago 7 0 1 1

They will be back! A good chinook wind would help.

1 month ago 1 0 0 0

Well, hopefully this flower count will remind people in the "colder areas of Canada" that Spring is on it's way! Flowers will arrive in other parts of the country before you know it...
๐Ÿ‡จ๐Ÿ‡ฆ๐ŸŒฑ๐ŸŒท

1 month ago 5 0 1 0