John Garver
@geogarver.bsky.social
Prof. of Geology, Cordilleran tectonics, rivers, hydrology, ice jams, water quality, invasive species, natural disasters, geochronology. Mohawk and Hudson watersheds. Board of Riverkeeper. Alaska, PNW, Maine, NY. "Notes from a Watershed" @ substack
Reposted by John Garver
Western Washington will receive significant rainfall through Wednesday.
My team is working with the National Guard to prepare for the impacts of this severe weather system — stay safe, heed warnings from local officials and be alert for flooding, strong winds, power outages and landslides.
My team is working with the National Guard to prepare for the impacts of this severe weather system — stay safe, heed warnings from local officials and be alert for flooding, strong winds, power outages and landslides.
December 9, 2025 at 12:27 AM
Western Washington will receive significant rainfall through Wednesday.
My team is working with the National Guard to prepare for the impacts of this severe weather system — stay safe, heed warnings from local officials and be alert for flooding, strong winds, power outages and landslides.
My team is working with the National Guard to prepare for the impacts of this severe weather system — stay safe, heed warnings from local officials and be alert for flooding, strong winds, power outages and landslides.
Reposted by John Garver
he first Sentinel1 images are in after the Alaskan M7 earthquake beneath Hubbard Glacier - no shortage of new landslides. Below are 28/11 and a 9/12 images! @watershedlab.bsky.social @davepetley.bsky.social
December 9, 2025 at 9:33 AM
he first Sentinel1 images are in after the Alaskan M7 earthquake beneath Hubbard Glacier - no shortage of new landslides. Below are 28/11 and a 9/12 images! @watershedlab.bsky.social @davepetley.bsky.social
Reposted by John Garver
ICYMI: Last week the @dec.ny.gov finalized new rules that require big polluters to report their emissions to the state. But, this is only a first step. Emissions reporting without meaningful emissions reduction won’t move New York closer to the cleaner and safer future we deserve.
December 8, 2025 at 8:15 PM
ICYMI: Last week the @dec.ny.gov finalized new rules that require big polluters to report their emissions to the state. But, this is only a first step. Emissions reporting without meaningful emissions reduction won’t move New York closer to the cleaner and safer future we deserve.
NYS needs more than public education:
“Don’t Be Salty, New York”
The DOT really needs to step up because salt is impairing drinking water across the state.
#saltwise #salinization
“Don’t Be Salty, New York”
The DOT really needs to step up because salt is impairing drinking water across the state.
#saltwise #salinization
As winter weather returns to the region, the Department of Environmental Conservation (DEC) is encouraging New Yorkers to be mindful of their rock salt usage.
DEC urges NYers to use rock salt sparingly this winter
As winter weather returns to the region, the Department of Environmental Conservation (DEC) is encouraging New Yorkers to be mindful of their rock salt usage.
www.news10.com
December 8, 2025 at 9:27 PM
NYS needs more than public education:
“Don’t Be Salty, New York”
The DOT really needs to step up because salt is impairing drinking water across the state.
#saltwise #salinization
“Don’t Be Salty, New York”
The DOT really needs to step up because salt is impairing drinking water across the state.
#saltwise #salinization
Reposted by John Garver
A strong clipper will make is way through the Upper Midwest on Tues., across the Great Lakes Tues. night, & head for the Northeast on Wed. Large area of >60% chances for at least Minor Impacts on Tuesday & into Wednesday AM due to a combination of heavy snow & blowing snow.
December 8, 2025 at 9:27 AM
A strong clipper will make is way through the Upper Midwest on Tues., across the Great Lakes Tues. night, & head for the Northeast on Wed. Large area of >60% chances for at least Minor Impacts on Tuesday & into Wednesday AM due to a combination of heavy snow & blowing snow.
Reposted by John Garver
Listened to the storm as captured by @alaskanime.bsky.social, learned where it is, and then was reminded of the relatively nearby wonderful Knik River, which provided an opportunity to produce this:
December 8, 2025 at 1:46 AM
Listened to the storm as captured by @alaskanime.bsky.social, learned where it is, and then was reminded of the relatively nearby wonderful Knik River, which provided an opportunity to produce this:
Reposted by John Garver
⚒️
*This* is what the people of Pompeii, and Herculaneum, and many other hapless souls saw—this is what a pyroclastic density current looks coming RIGHT at you.
Filmed from a CCTV camera during the Mount Semeru eruption on Java, Indonesia on 4 December 2022.
Video credit: PT United Tractors Tbk
Filmed from a CCTV camera during the Mount Semeru eruption on Java, Indonesia on 4 December 2022.
Video credit: PT United Tractors Tbk
December 7, 2025 at 6:55 PM
⚒️
Reposted by John Garver
"Allowing more #PFAS pesticides – and disparaging safer organic alternatives – won’t make America healthy again. And contaminating our farmland with persistent forever chemicals won’t help the farmers who feed us."
VIA @ewgofficial.bsky.social
www.ewg.org/news-insight...
VIA @ewgofficial.bsky.social
www.ewg.org/news-insight...
EWG to Lee Zeldin: PFAS pesticides are bad news, not ‘fake news’
Environmental Protection Agency Administrator Lee Zeldin claims “fake news” to reports spotlighting the agency’s approval of new pesticides made with the toxic “
www.ewg.org
December 7, 2025 at 11:57 AM
"Allowing more #PFAS pesticides – and disparaging safer organic alternatives – won’t make America healthy again. And contaminating our farmland with persistent forever chemicals won’t help the farmers who feed us."
VIA @ewgofficial.bsky.social
www.ewg.org/news-insight...
VIA @ewgofficial.bsky.social
www.ewg.org/news-insight...
Reposted by John Garver
It's over.
Despite the fact that the academic council recommended against it, despite the fact that the program brought in more tuition than it cost, and despite the fact that Nebraskans need & deserve this expertise, Earth & Atmospheric Sciences will be cut.
www.dailynebraskan.com/news/adminis...
Despite the fact that the academic council recommended against it, despite the fact that the program brought in more tuition than it cost, and despite the fact that Nebraskans need & deserve this expertise, Earth & Atmospheric Sciences will be cut.
www.dailynebraskan.com/news/adminis...
BREAKING: ‘This hurts’: UNL eliminates 4 programs despite faculty, student pleas
The University of Nebraska-Lincoln eliminates the Earth and atmospheric sciences 8-0, educational administration 7-1, statistics 7-1, textiles, merchandising and fashion design 7-1 programs.
www.dailynebraskan.com
December 6, 2025 at 5:35 PM
It's over.
Despite the fact that the academic council recommended against it, despite the fact that the program brought in more tuition than it cost, and despite the fact that Nebraskans need & deserve this expertise, Earth & Atmospheric Sciences will be cut.
www.dailynebraskan.com/news/adminis...
Despite the fact that the academic council recommended against it, despite the fact that the program brought in more tuition than it cost, and despite the fact that Nebraskans need & deserve this expertise, Earth & Atmospheric Sciences will be cut.
www.dailynebraskan.com/news/adminis...
Reposted by John Garver
We have updated the Hubbard Glacier Earthquake that happened at 11:41 am to a magnitude 7. More than 20 aftershocks over magnitude 3 have followed the mainshock so far, with the largest aftershocks ranging from M4 to M5.1.
December 6, 2025 at 10:05 PM
We have updated the Hubbard Glacier Earthquake that happened at 11:41 am to a magnitude 7. More than 20 aftershocks over magnitude 3 have followed the mainshock so far, with the largest aftershocks ranging from M4 to M5.1.
Reposted by John Garver
Today's shallow M7 #earthquake near the Yukon-Alaska border has produced more than 60 #aftershocks (some as large as M5.1) during the first 5 hours.
Live #shaking from a seismic station at Haines Junction (YT) shows a steady stream of aftershocks:
www.earthquakescanada.nrcan.gc.ca/stndon/wf-fo...
⚒️🧪
Live #shaking from a seismic station at Haines Junction (YT) shows a steady stream of aftershocks:
www.earthquakescanada.nrcan.gc.ca/stndon/wf-fo...
⚒️🧪
December 7, 2025 at 2:07 AM
Today's shallow M7 #earthquake near the Yukon-Alaska border has produced more than 60 #aftershocks (some as large as M5.1) during the first 5 hours.
Live #shaking from a seismic station at Haines Junction (YT) shows a steady stream of aftershocks:
www.earthquakescanada.nrcan.gc.ca/stndon/wf-fo...
⚒️🧪
Live #shaking from a seismic station at Haines Junction (YT) shows a steady stream of aftershocks:
www.earthquakescanada.nrcan.gc.ca/stndon/wf-fo...
⚒️🧪
Reposted by John Garver
Kilauea is doing what Kilauea does.
Watch live:
www.youtube.com/watch?v=fiyt...
(h/t to @sophiecarr.bsky.social)
Watch live:
www.youtube.com/watch?v=fiyt...
(h/t to @sophiecarr.bsky.social)
December 6, 2025 at 8:36 PM
Kilauea is doing what Kilauea does.
Watch live:
www.youtube.com/watch?v=fiyt...
(h/t to @sophiecarr.bsky.social)
Watch live:
www.youtube.com/watch?v=fiyt...
(h/t to @sophiecarr.bsky.social)
"...it could jeopardize water supplies for millions of residents and accelerate the collapse of salmon, steelhead, sturgeon and other endangered species in the Delta."
socalwaterwars.substack.com/p/trumps-wat...
socalwaterwars.substack.com/p/trumps-wat...
Trump's water-export plan threatens salmon gains & State's fishing industry
The action stems from Trump's January executive order increasing water flows south of the Delta. Big-Ag celebrates. Tribes, enviros, fishing & State oppose.
socalwaterwars.substack.com
December 6, 2025 at 9:59 PM
"...it could jeopardize water supplies for millions of residents and accelerate the collapse of salmon, steelhead, sturgeon and other endangered species in the Delta."
socalwaterwars.substack.com/p/trumps-wat...
socalwaterwars.substack.com/p/trumps-wat...
Reposted by John Garver
M6.9 Yakutat #earthquake is located very close to the border of the USA and Canada. Preliminary results from GFZ Potsdam indicate relatively high non double couple component with oblique mechanism. ⚒️🧪
December 6, 2025 at 9:28 PM
M6.9 Yakutat #earthquake is located very close to the border of the USA and Canada. Preliminary results from GFZ Potsdam indicate relatively high non double couple component with oblique mechanism. ⚒️🧪
Reposted by John Garver
It now has a name. "2025 Yakutat Earthquake".
December 6, 2025 at 9:32 PM
It now has a name. "2025 Yakutat Earthquake".
December 6, 2025 at 9:32 PM
Reposted by John Garver
You are ABSOLUTELY NOT going to regret listening to this bird:
A male rock ptarmigan (Lagopus muta) in winter plumage.
Ptarmigan is from Gaelic 'tarmachan' meaning "croaker". The p- was added when people mistakenly assumed it was a Greek word.
A bird forever warning people: "A werewolf!" (just in case of werewolves).
Ptarmigan is from Gaelic 'tarmachan' meaning "croaker". The p- was added when people mistakenly assumed it was a Greek word.
A bird forever warning people: "A werewolf!" (just in case of werewolves).
December 6, 2025 at 5:10 PM
You are ABSOLUTELY NOT going to regret listening to this bird:
Reposted by John Garver
The tiniest of river creatures can tell us how healthy our rivers are from NC's Haw and Deep Rivers all the way downstream to the Cape Fear. Rivers are a place for learning, connection, and community — and we all deserve a clean, healthy river system. www.wunc.org/environment/...
River Watchers look for tiny critters to help understand the health of local waterways
Hundreds of volunteers across central North Carolina are part the Haw River Watch Program. Since December 1994, the program has collected information that helps inform basin planning.
www.wunc.org
December 5, 2025 at 10:18 PM
The tiniest of river creatures can tell us how healthy our rivers are from NC's Haw and Deep Rivers all the way downstream to the Cape Fear. Rivers are a place for learning, connection, and community — and we all deserve a clean, healthy river system. www.wunc.org/environment/...
Reposted by John Garver
The EPA & Army Corps aim to strip protections from wetlands & streams, threatening drinking water & habitats. In NY, 92% of wetlands could lose federal protections.
Your voice matters.🗣️ Speak up today to defend our waters 💧🌿 https://engage.riverkeeper.org/protect-ny-wetlands
Your voice matters.🗣️ Speak up today to defend our waters 💧🌿 https://engage.riverkeeper.org/protect-ny-wetlands
December 5, 2025 at 9:35 PM
The EPA & Army Corps aim to strip protections from wetlands & streams, threatening drinking water & habitats. In NY, 92% of wetlands could lose federal protections.
Your voice matters.🗣️ Speak up today to defend our waters 💧🌿 https://engage.riverkeeper.org/protect-ny-wetlands
Your voice matters.🗣️ Speak up today to defend our waters 💧🌿 https://engage.riverkeeper.org/protect-ny-wetlands
Reposted by John Garver
For over 50 years, the Clean Water Act has been the first line of defense for your drinking water. After all, the fundamental U.S. law is specifically tasked with reducing water pollution and protecting our nation’s water resources.
🚰 Learn more: www.americanrivers.org/2025/01/keep...
🚰 Learn more: www.americanrivers.org/2025/01/keep...
Keeping pollution out of your water: How the Clean Water Act protects your water
It might seem obvious to state that the Clean Water Act (CWA), established in 1972, is critical to the drinking supply of millions of Americans. After all, this fundamental U.S. law is specifically ta...
www.americanrivers.org
December 5, 2025 at 10:05 PM
For over 50 years, the Clean Water Act has been the first line of defense for your drinking water. After all, the fundamental U.S. law is specifically tasked with reducing water pollution and protecting our nation’s water resources.
🚰 Learn more: www.americanrivers.org/2025/01/keep...
🚰 Learn more: www.americanrivers.org/2025/01/keep...
Reposted by John Garver
Reposted by John Garver
Collapse of key Atlantic current could bring extreme drought to Europe for centuries, study finds. @swinda.bsky.social
That's an under-appreciated impact of #AMOC shutdown, of particular concern given the recent results showing much higher likelihood of this. 1/2
www.livescience.com/planet-earth...
That's an under-appreciated impact of #AMOC shutdown, of particular concern given the recent results showing much higher likelihood of this. 1/2
www.livescience.com/planet-earth...
December 5, 2025 at 11:42 AM
Collapse of key Atlantic current could bring extreme drought to Europe for centuries, study finds. @swinda.bsky.social
That's an under-appreciated impact of #AMOC shutdown, of particular concern given the recent results showing much higher likelihood of this. 1/2
www.livescience.com/planet-earth...
That's an under-appreciated impact of #AMOC shutdown, of particular concern given the recent results showing much higher likelihood of this. 1/2
www.livescience.com/planet-earth...
Reposted by John Garver
Our infrastructure isn’t ready for what’s coming.
The Bay took over the highway during this morning's #KingTides in Marin.
December 5, 2025 at 12:13 AM
Our infrastructure isn’t ready for what’s coming.