~1.3m water column height variation observed by the closest DART buoy at 48°7'34" N 163°22'35" E (5787m nominal water depth).[1] [1] https://www.ndbc.noaa.gov/station_page.php?station=21416&typ...
Is that a lot?
M8.7 earthquake in Western Pacific, tsunami warning issued
61–70 of 266 posts
Re: M8.7 earthquake in Western Pacific, tsunami warning issued
#62to put this in perspective, and please, if you work for USGS or whatever, correct me if i am wrong: this is roughly the same magnitude of the 1994 Northridge earthquake in California.
i think i got the scale the wrong way around, the magnitudes reported now are only larger (than Richter) with smaller quakes compared to the Richter; it looks like 8.8ML ~= M8.8. Sorry, i looked at the chart the wrong way around.
Re: M8.7 earthquake in Western Pacific, tsunami warning issued
#63[deleted]
Re: M8.7 earthquake in Western Pacific, tsunami warning issued
#64Japan forecasting tsunamis up to 3m across basically the entire eastern coast. First waves will hit within 10 minutes. https://www.nhk.or.jp/kishou-saigai/tsunami/ https://www3.nhk.or.jp/news/live/ (live, Japanese) https://www3.nhk.or.jp/nhkworld/en/live/ (live, English) The east coast is also where the vast majority of Japan's population lives, and was previously hit by the 2011 tsunami (Fukushima and all that). We'…
Yike!!
Re: M8.7 earthquake in Western Pacific, tsunami warning issued
#65to put this in perspective, and please, if you work for USGS or whatever, correct me if i am wrong: this is roughly the same magnitude of the 1994 Northridge earthquake in California. i think i got the scale the wrong way around, the magnitudes reported now are only larger (than Richter) with smaller quakes compared to the Richter; it looks like 8.8ML ~= M8.8. Sorry, i looked at the chart the wrong way around.
What? No that was a 6.7 or less than one hundredth an 8.8 on a log10 scale
Re: M8.7 earthquake in Western Pacific, tsunami warning issued
#66to put this in perspective, and please, if you work for USGS or whatever, correct me if i am wrong: this is roughly the same magnitude of the 1994 Northridge earthquake in California. i think i got the scale the wrong way around, the magnitudes reported now are only larger (than Richter) with smaller quakes compared to the Richter; it looks like 8.8ML ~= M8.8. Sorry, i looked at the chart the wrong way around.
You are off by about a factor of 1,000.
Each incremental increase in magnitude is 10^1.5 in power. The difference between 1994 Northridge and this one is 2.1, so roughly 10^3 difference in power.
Re: M8.7 earthquake in Western Pacific, tsunami warning issued
#67Quick link to the tsunami view: https://www.tsunami.gov/ Just “watch” level for US west coast, but warning level for Hawaii and Alaska.
Upgraded to an "advisory" for the California coast.
Re: M8.7 earthquake in Western Pacific, tsunami warning issued
#68AIS map of vessels in the area: https://www.marinetraffic.com/en/ais/home/centerx:166.7/cent... A fairly small US fishing vessel is in relative proximity... https://www.marinetraffic.com/en/ais/details/ships/shipid:43... Talked to the AI which said: MMI 4.5 in the context of an M8.7 quake, for your vessel: Danger level from shaking alone: Very low in open water. Danger from tsunami in the open ocean: Very low (unless…
> That's interesting. Mental note, if piloting a vessel in a tsunami, head to deep water.
E.g. the 2011 tsunami may have had a height of 1.2m or so in open ocean, but when concentrated by shallower water and a bay inlet reached 40m.
Re: M8.7 earthquake in Western Pacific, tsunami warning issued
#69My wife decided to not travel to Japan due to an impending warning from a manga for July 2025. I have been making fun of her all month only to get this tsunami warning now! https://en.wikipedia.org/wiki/July_2025_Japan_megaquake_prop... . > The 2021 reprint capitalizing off this revived popularity warned of a "real disaster" in July 2025, causing a minor case of mass hysteria in 2025 when summer trips to Japan from E…
Sadly we won’t hear from the partners of everyone whose manga didn’t successfully predict a real disaster in a month.
That's because the other mangas forgot to adjust by +/- some 1000 km for location, 25 days, 365 days, 1825 days, or some other arbitrary but possibly nicely divisible number, for when and where it strikes.
You also have to conveniently forget the things that don't sell mangas such as annual typhoons, heatwaves, and of course thousands of premature deaths from man-made causes such as pollution and poor lifestyle.
Otherwise, if predicting disasters was easy, everybody would be doing it. No, it takes special, paper-based skills such as mangas , tarot cards, weekly horoscopes, etc.
Re: M8.7 earthquake in Western Pacific, tsunami warning issued
#70Earlier quoted context omitted.
Don’t worry, if there’s one nation we can trust to have done the right thing, it’s Japan.
I honestly can’t tell if this is satire.
Same. Japan's earthquake/tsunami preparedness is genuinely unmatched, but earthquakes/tsunamis have the annoying habit of happening in the "wrong" place and the country's overall record of "doing the right thing" can charitably be described as spotty.