Posted on 04/20/2026 3:07:26 AM PDT by Az Joe
Japanese authorities are warning that a second tsunami may be on the way after a 7.5 magnitude earthquake struck off the country's north-east coast
(Excerpt) Read more at bbc.com ...
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“Hashikami Town” is the +5 quake.
I’ve never heard of that town. But I have never been to Japan. Very likely I never will be there.
Seriously, I hope damage and injuries are very minimal.
I know the Japanese have skill and experience dealing with Tsunamis. But not much you can do about what is likely going to be a pretty huge one except get out of the way. Other places besides Japan will likely get hit too.
Prayers for those affected.
Oh no, there goes Tokyo.
Japan Meteorological Agency just issued a rare warning for a potential mega-quake for two of the deep trench faults that run along the east coast of Honshu. They think this 7.7M quake might be a foreshock for a really big one.
That’s pretty scary.
Interesting that the Japanese consider earthquakes as “weather”.
Their “dual” system for rating quakes is quite useful, once one realizes which is being used and what it means.
“Magnitude” / strength, such as the 7.5 or 7.7 number quoted refers to the power, or energy, the quake released.
“Intensity” — I would call it “shaking intensity” — refers to the intensity wherever one might be, where the quake is detectable. I should go hunt up info. on how damage typically is rated or expected vs. shaking intensity, although I wonder if the Japanese scale reflects their quality of earthquake resistance?
7.7 is no small potatoes itself, depending of course on many factors. If the New Madrid fault let loose with a series of similar quakes, my family and I would be in BIG trouble, and a lot of people around here in much more trouble. :-(
The entire BC-WASHINGTON-OREGON-NORCAL coastline from Vancouver to Cape Mendocino is now 125 years overdue for a Mag 8.0 to Mag 9.6 earthquake. Last one was January 23, 1700. Its tsunami wiped villages in Japan a few hours latter.
Every Indian in every Indian village on that coastline was killed.
This is the USGS Earthquake Tracking website map of today’s Mag 7+ earthquake and its aftershocks.
Not all were killed, many. Many of the villages were built on sites located on higher, well drained ground. Also, they didn’t have far to run to get to higher ground.
When Captain Gray (first US flag merchant ship to arrive on West Coast) arrived in 1787, the native villages were fully recovered.
Remember, 87 years after that sudden mass destruction, villages and survivors will expand rapidly into tiny spots of people. Lewis and Clark could not have know about the earthquake when they camped over the winter 1804 winter months on the coast. But they specifically wrote about "not finding" any Indians in the region - especially compared to the rest of the country from St Louis on the Mississippi River all the way across the Oregon-Washington coast.
From the web,
AI Overview
Pacific Northwest Seismic Network
Indian Villages on Tillamook Bay
Locations: Researchers have identified approximately twelve Native American sites around Tillamook Bay, which were historically inhabited by the Tillamook (Killamook) people.
Main Settlement: A major winter village was located at Kilchis Point, just south of present-day Bay City.
Other Sites: Evidence of habitation exists at most creek outlets around the bay, with significant locations at Netarts (meaning “near the water”), the Netarts spit, and Wilson Beach.
Settlement Patterns: Villages were typically situated at low-lying river estuaries for access to resources. Winter villages were often placed in sheltered areas but were still vulnerable to the 1700 tsunami, which decimated coastal settlements.
Neahkahnie Visions
+5
1700 Tsunami Impact and Deaths
Fatalities: Specific death numbers for Tillamook Bay are not recorded, but in similar low-lying areas, such as Pachena Bay (Vancouver Island), entire villages were wiped out with almost no survivors.
Extent of Damage: The tsunami, arriving shortly after midnight on a winter night, obliterated communities that were less than 75 feet above sea level.
Oral Traditions: Coastal tribes (including those in southern Oregon) described a “huge tidal wave” where the “ocean rose up,” sweeping away villages and overturning canoes.
Geological Evidence: “Ghost forests” (dead, saltwater-drowned trees) and sand deposits in tidal marshes confirm that the land around Tillamook Bay subsided, leading to intense flooding.
USGS Earthquake (.gov)
+4
Note: The 1700 Cascadia Earthquake occurred over 100 years before European settlers arrived, so while native oral histories record the event, written records of the immediate aftermath do not exist.
1700 Cascadia Subduction Zone Earthquake
What Happened? On January 26th, 1700, one of the world's largest known earthquakes occurred on the Cascadia Subduction Zone.
Pacific Northwest Seismic Network
Big Tsunami Destroys Native Village in 1700 - Jefferson Public Radio
Mar 3, 2017 — Nothing has equaled the earthquake of 1700 that shook the Cascadia Subduction Zone. Its winter tsunami's 50 to 60-foot waves wiped...
Jefferson Public Radio
The 1700 Cascadia Megathrust Earthquake and the Future of ...
Oral accounts from indigenous Native American and First Nation tribes living on the coast of Vancouver Island in Canada that have ...
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