81–90 of 266 posts
Earlier quoted context omitted.
Is height the only thing that matters? Presumably 1x 2m wave is less impactful than 10 x 1m waves spread 20 seconds apart?
Despite the common vernacular calling them "waves" they're really more like really really high tides. You're talking about something that happens over, say, 10-90 minutes, not seconds.
Japan 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'…
Here are some live streams.. No action yet. Fingers crossed! From a helicopter Japanese KATU news https://www.youtube.com/live/mBQHNV7cqrM?si=lwqB5YHknA7KUTY_ Webcams https://www.youtube.com/live/5pTPKHJxQ4g?si=xWe5MkLKIZ3N5I8D Hawaii news https://m.youtube.com/watch?v=lVy5nLWruu0&pp=ygUSSmFwYW4gdHN...
Earlier quoted context omitted.
How big was the 2011 tsunami? Is 3m bigger or smaller?
It's complicated. Tsunami forecasting is a very inexact science and "3m" means "very large". The average actual height in eastern Japan (Tohoku) was 4-6m, but there were peaks up to 20m in places like Ofunato where the local geography funneled all the water upwards. https://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_an...
The seawall was 5.7m.
to 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.
to 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.
Earlier quoted context omitted.
Despite the common vernacular calling them "waves" they're really more like really really high tides. You're talking about something that happens over, say, 10-90 minutes, not seconds.
Again the only correct comment is downvoted. Watch Tsunamis on Youtube. The water just keeps coming and coming. They are like high tides.
to 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
Japan 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'…
Japanese news reporting during disaster scenarios is something to behold. The screen is filled with data and blinking like a Bloomberg Terminal.