It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
originally posted by: Phage
a reply to: BlueJacket
For what its worth, my wife heard from family and friends up in Washington that they saw " Earthquake lights" last night.
That's a pretty vague terminology. And often noted after the fact.
Are you on the coast?
originally posted by: network dude
a reply to: TrueAmerican
have there been any promising work with prediction based on events such as you are listing now? We always have the anecdotal things like lights in they sky, whales beaching themselves, and so on, none of which seem to be solid indicators of anything. I was just curious as to if we are any closer to a warning system for the West coast. and thanks for your work and dedication here.
I mean go dig up some info on the Explorer Plate or something, and perhaps tell me why you don't think this could affect the Cascadia Fault given the relative plate motions.
In this article, a case is made for very-large or primary seismogenic structures in convergent margins, based on anomalous large earthquake magnitudes (Mw 8 - 9) relative to rupture lengths. Out of 56,293 earthquakes (magnitudes ≥ 5) cataloged worldwide, the 10 largest events in transform, divergent, and interior settings average magnitudes of 7.3 - 7.6. But in convergent margins, the average magnitude of the 10 largest events is 8.5, roughly 32 times more energy than the other neotectonic settings. The large anomalous magnitudes of energy release in convergent margins are attributed to the transfer of inter-plate stress to the upper-plate, where convergent elastic strain is accumulated during interseismic intervals.
A broad source region of coseismic energy release in the Cascadia primary seismogenic structure (300 - 450 km width) could yield stronger shaking in interior metropolitan centers from a future major rupture of the mega-thrust than has been modeled from a narrow “locked” zone located offshore under the outer continental shelf. Despite low dip angle and associated wide inter-plate coupling, the Cascadia margin likely serves as an example of inter-plate shear stress transfer to elastic strain accumulation in the upper-plate of some other well-coupled convergent margins worldwide.
Location map for the Cascadia convergent margin, as composed of the Juan De Fuca plate segment (central Cascadia margin), the Explorer plate segment (northern Cascadia margin), and Gorda plate (southern Cascadia margin). We focus on the area from 41˚N to 50˚N and 117˚W to 127.5˚W.
originally posted by: TrueAmerican
As to your question, yes, an early warning system of a huge swath of Ocean Bottom Seismometers all along that fault out at sea has been proposed, and they are trying to raise the interest and funds for it.
originally posted by: Phage
a reply to: carsforkids
Florida I believe it is?
Nope. More south.
2019-12-25 20:40:15.9 7hr 21min ago
47.21 N 123.30 W 2 2.7 OLYMPIC PENINSULA, WASHINGTON
2019-12-25 20:38:52.8 7hr 23min ago 50.85 N 130.26 W 10 4.8 VANCOUVER ISLAND, CANADA REGION