Live data from Hacker News

Strong earthquake hits northern Japan, tsunami warning issued

www3.nhk.or.jp

31–40 of 168 posts

Re: Strong earthquake hits northern Japan, tsunami warning issued

#31
post #10

Epicentre very deep underground, so shouldn’t be dangerous aside from small tsunamis.

Your comment prompted me to go read about epicenters and I learned something new. The hypocenter of an earthquake is apparently the point of origin of the earthquake and the epicenter is the point on the earth's surface directly above the hypocenter. Had never heard of a hypocenter before.

Re: Strong earthquake hits northern Japan, tsunami warning issued

#33
post #16

Does anyone else find the way of using tsunami.gov totally baffling? It tells the user almost nothing, and the target of all the hrefs for the supposed messages listed in the map is just the tsunami.gov homepage again. The entire above-the-fold is occupied by the map, and the map tells the user nothing.

The map has pins for events. At this moment there is one off Japan and one off Alaska.

Re: Strong earthquake hits northern Japan, tsunami warning issued

#34
post #30

Earlier quoted context omitted.

That's correct, if relatively small earthquakes would stop that could be the precursor to a much bigger one. It's like releasing tension gradually rather than all at once.

Isn’t that a myth? Do you have any sources to back up your claim?

Various scientists in this video. The video is a great watch btw.

https://youtu.be/HBluLfX2F_k

(stresses build up and are often released through many small, unfelt earthquakes (25:54). If these small movements don't dissipate the stress, it can accumulate and lead to a powerful chain reaction (26:25) * disclaimer I used YouTube's built-in AI to find/summarize the timestamps, as I couldn't remember offhand where it was when I previously watched this.

Re: Strong earthquake hits northern Japan, tsunami warning issued

#37

NHK (english): https://www3.nhk.or.jp/nhkworld/en/news/20251209_02/ > The Japanese government set up a task force at the crisis management center in the prime minister's office at 11:16 p.m. on Monday in response to the earthquake. A thousand Naruto shadow-clones just got deployed. I'm not being cute, these guys are heroes and role-models to all.

I’m imagining the folks from Shin Godzilla.

I assume that movie is for Japanese civil servants like the show Silicon Valley is for programmers. Stuff like the repeated meeting-room changes for no apparent reason reads as too specific and weird to be made-up.

Re: Strong earthquake hits northern Japan, tsunami warning issued

#38
post #30

Earlier quoted context omitted.

That's correct, if relatively small earthquakes would stop that could be the precursor to a much bigger one. It's like releasing tension gradually rather than all at once.

Isn’t that a myth? Do you have any sources to back up your claim?

Seems like it, & each rank is 30x more energy than the last[1]

https://www.usgs.gov/faqs/what-probability-earthquake-a-fore... Suggests 5% for larger quake to follow within week. But overall most sources I could find suggested it's hard to know, needs more research

1: https://www.reddit.com/r/askscience/comments/10wecl8/do_litt...

Re: Strong earthquake hits northern Japan, tsunami warning issued

#40

This would be the tenth major earthquake (7+ magnitude) along the Pacific ring of fire this year. With the Kamchatka and other earthquakes in the news recently I had a fear that were building to some major event but turns out that this year is about average if not slightly below average for major quakes along the ring of fire.

I heard that smaller (relative) earthquakes actually lower the prob of larger ones, so maybe it is a good thing? A bunch of 7.X earthquakes in the ocean are not going to be hugely destructive.

> A bunch of 7.X earthquakes in the ocean are not going to be hugely destructive.

New Zealand’s 5th most deadly disaster was Christchurch’s 6.2 which killed 185 people. It was a shallow aftershock from a larger, less destructive quake.

The damage was huge.

https://en.wikipedia.org/wiki/2011_Christchurch_earthquake

Post reply on HN