Live data from Hacker News

Strong earthquake hits northern Japan, tsunami warning issued

www3.nhk.or.jp

61–70 of 168 posts

Re: Strong earthquake hits northern Japan, tsunami warning issued

#62

Earlier quoted context omitted.

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.

I didn't know about hypocenter before too but it's neat how you can sometimes deduce the meaning of a word from its parts (because "hypo" means "under"/"below" in Greek, like in hypodermic, hypoglycaemia, etc).

The class wasn't as interesting as I'd hoped, in part because it seemed to attract older kids hoping for an easy grade, but in my high school we had an etymology class.

(My school also offered Latin, but etymology seemed a much more direct/easier way to get the same basics. I just wish someone had taught me about demographics so I would have taken Spanish instead of German.)

Re: Strong earthquake hits northern Japan, tsunami warning issued

#63

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.

What's a Naruto shadow clone? Google hits are just about a kids show.

Re: Strong earthquake hits northern Japan, tsunami warning issued

#64

Earlier quoted context omitted.

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

The key phrase in the parent is “in the ocean”

Re: Strong earthquake hits northern Japan, tsunami warning issued

#65
post #58

Today I got served this video " Earthquake and Liquefaction his Urayasu, Chiba 3/11/2011 " [0], which is from the earthquake which caused the huge tsunami in Japan. I have rarely seen something as scary as this. [0] https://www.youtube.com/watch?v=FGblnPeOXJg

The flood videos of towns, cars, and people being violently washed away are way scarier IMO.

Urayasu looks built on the water and all I see in the linked video is a threshold condition where the water is just barely peeking up through the ground below. People are still walking around, cars driving. There are far more chaotic and destructive scenes on youtube from that tsunami.

Re: Strong earthquake hits northern Japan, tsunami warning issued

#66
post #45
post #4

https://www.tsunami.gov/?p=PHEB/2025/12/08/25342050/2/WEPA40 Shouldn't be too bad; USGS forecasts up to 1 meter tsunami.

1 meter is bad. That's a lot of water full of things you don't want slamming into you or any structure. Then it comes back full of even worse things.

Is 1 meter bad? In context it seems to be missing what kind of waves normally hit the coast line, and what kind tide differences exist, and what the current water level is when the wave hit.

What is a typical maximum wave height during hurricane seasons in north of japan?

Re: Strong earthquake hits northern Japan, tsunami warning issued

#69
post #8

Earlier quoted context omitted.

Funny, I had the exact opposite reaction. Things I had taken for granted all my life suddenly became un-anchored and as a result so did I. I have never felt an actual feeling of panic that threatened to overwhelm me before that happened and it was a very mild earthquake. I had to really force myself to calm down and stay rational and do what was the safest rather than to give in to the 'flee' reflex. The problem with…

99% of your problem can be solved by studying statistics for your area, and having a plan... So that you aren't just at the whims of the moment when it's actually happening.

What kinds of statistics is it that one should study?

Having a bugout bag and emergency supplies and water on hand is a reasonable idea everyone with the means ought to do; it's a good thing to not have to depend on gov't intervention (not because of a lack of trust, but because the general public will, and the potential for mob situations is high).

But what should I have read about to know what to do? Topological maps and flood planes?

Re: Strong earthquake hits northern Japan, tsunami warning issued

#70
post #30

Earlier quoted context omitted.

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

https://www.geo.ruhr-uni-bochum.de/en/new-study-connects-ear...

https://news.caloes.ca.gov/earthquake-myths-separating-fact-...

Myth 5 is "Small Earthquakes Relieve Pressure and Prevent Larger Ones"

Post reply on HN