[HN Gopher] Magnitude 7.3 earthquake off the Coast of Fukushima ...
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Magnitude 7.3 earthquake off the Coast of Fukushima Prefecture
Author : Kuinox
Score : 160 points
Date : 2022-03-16 15:03 UTC (7 hours ago)
(HTM) web link (www.data.jma.go.jp)
(TXT) w3m dump (www.data.jma.go.jp)
| sva_ wrote:
| Comparison: The 2011 earthquake had a magnitude of 9.0 - 9.1 (but
| it had a 7.2 foreshock 2 days before.)
|
| https://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_an...
| frellus wrote:
| The thing most people don't mention is that after the March
| 11th 2011 earthquake, we had daily aftershocks, the kind you
| could easily feel, which lasted for _months_. Seems to happen
| mostly at night, most disconcertingly, as I was woken up out of
| bed more times than I could count with ones large enough to
| cause me to jump up and think the "big one" was hitting Tokyo.
|
| Took me a good year, and moving out of Japan, to calm down
| about it and realize just how much daily stress it had caused
| me, how much on edge you are after something like this. Of
| course, nothing happened, but when your system is constantly in
| heightened awareness mode, the way I expect soldiers in a
| warzone feel wondering if there's someone around the corner
| waiting to get you, you start to build up PTSD in a real way.
|
| Side note: add in a bit of nuclear fallout concern, plus having
| young kids and some playgrounds in Tokyo getting abnormally
| high enough readings they had to close them... oh, in addition
| to tainted food supply, and you'll maybe understand.
| Hulitio wrote:
| We visited Japan 3 years ago and it stuck with me how normal
| earthquakes, alerts for this and tsunamis are.
|
| Like wtf!
| teraku wrote:
| Japan is not only the country hit most frequently by a
| large margin, it is also the country hit by the strongest
| natural disasters.
| claytongulick wrote:
| It's certainly up there [1]. I didn't realize that Costa
| Rica and the Philippines were even higher than Japan.
|
| According to [2] the US has the most severe weather in
| the world, which is interesting. I've certainly
| experienced some of it, tornadoes are horrifying.
|
| I had a crazy experience in Oklahoma City once where I
| ran out of my hotel because of an earthquake only to see
| two funnels on the ground coming towards me.
|
| [1] https://en.wikipedia.org/wiki/List_of_countries_by_na
| tural_d...
|
| [2] https://www.usatoday.com/story/weather/2013/05/16/ext
| reme-we...
| yamazakiwi wrote:
| I remember the aftershocks, and I still have ptsd regarding
| earthquakes. I've felt a few small ones back stateside and
| feels like it starts the cycle over again. Not sure how long
| it will take for me to get over it.
| dvngnt_ wrote:
| talk to a doctor
| pizza wrote:
| Just curious, what would you expect to happen if they
| did?
| s5300 wrote:
| I don't exactly understand why he's being downvoted.
| Perhaps he could have worded things better, but I read it
| in good faith.
|
| A doctor may be able to tell them some specific coping
| mechanisms that could be helpful in breaking the thought
| loop they were otherwise unaware of, & sometimes a short
| duration of medication like a benzo can break the anxiety
| enough so that it doesn't come back.
|
| Obviously, it's hard to tell over the internet, & that's
| why it's recommended to see a professional.
| oceanghost wrote:
| If he/she actually has PTSD-- which is entirely within
| the realm of possibility, there are medications such as
| Prazosin as well as therapy that can help.
| lostlogin wrote:
| The Christchurch earthquake in New Zealand had a lot of
| aftershocks and a lot of people left the city to avoid them.
| Here is an article saying that there were 11,200 aftershocks
| in the following 2 years.
|
| https://www.odt.co.nz/news/national/11000-aftershocks-
| christ...
| djrobstep wrote:
| Yep can confirm, I lived in Christchurch through the quake
| and aftermath. Aftershocks multiple times a day for months
| afterwards.
| 8ytecoder wrote:
| Living in the Bay Area and right atop a fault, I feel phantom
| shakes. I usually have my ham radio tuned to the local
| repeater and people start reporting real ones almost
| instantaneously. So I use that as indicator to calm myself.
|
| Hasn't affected my life but it's always there in the back of
| my mind. I realised I'm also a lot more sensitive to them
| than anyone else I know. Almost all the major ones -
| including the one in Napa have woken me up, usually in cold
| sweat and heart palpitations.
| almog wrote:
| While I hope it is a small quake compared to the 2011
| earthquake, the main 2011 earthquake came 2 days after a 7.1
| foreshock quake:
|
| https://en.wikipedia.org/wiki/List_of_earthquakes_in_Japan
|
| https://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_an...
| danuker wrote:
| Hope today's was not the foreshock to something bigger.
| Denvercoder9 wrote:
| For those unware, the magnitude scales used to measure
| earthquakes are logarithmic, with released energy increasing by
| a factor of about 32 (10^3/2 to be exact) for each step. Thus,
| the 9.1 earthquake from 2011 released about 500 times as much
| energy as the one from today.
| thrdbndndn wrote:
| I feel like it should also be added that part of (not all)
| the reason we use logarithmic scale for these things to begin
| with is precisely because their "damage" or impact is not
| linearly correlated to the energy released from the event
| (same goes to dBPL used in sound pressure).
|
| Unfortunately, it's not linear to the logarithmic scale
| either so it's hard to get a intuitive "feeding" from it.
|
| I'd say it's something in between but closer to the linear
| scale in earthquake's case.
| andrepd wrote:
| Reminder that 9 isn't ~25% larger than 7, its 100x larger.
| Shadonototra wrote:
| Chip plants and nuclear plants in high seismic activity land
|
| People who gave the greenlight should be in jail for the rest of
| their lives
| [deleted]
| x62Bh7948f wrote:
| I felt a 3-ish small one for about 5 seconds and then it was
| over. About a minute later it began again but this time it was
| definitely over 4 (I'm in Tokyo). It was long too, almost a
| minute I think (by the end it was not so strong, maybe 4-5 during
| the first 15 seconds or so)
| mlindner wrote:
| Just to clarify for others, the numbers used in the above post
| are shindo-scale which are a location-dependent measurement of
| actual movement. They are used much more in Japan versus
| magnitude numbers.
| genewitch wrote:
| i used to live very close to a fault in Los Angeles County,
| and the numbers i remember from the 80s and 90s don't seem to
| correlate to the numbers i hear now - i left CA in 2006. The
| running joke with my CA friends is "don't even tweet/post
| about it unless it's a 7.0" whereas a 7.0 would mean
| widescale destruction back when i lived there. I remember the
| Apple Valley Quake, it was a rolling quake, and it was
| somewhere between a 4.8 and a 5.4. It derailed trains, and
| caused a bunch of property damage. I had a ham radio at the
| time and i was tuned into two of the biggest repeaters in
| southern california (one being "the nut") and listened to the
| damage reports and movement of emergency crews.
|
| We were quite far from that one, and it wasn't violent, but
| it still caused property damage and power outages due to
| shorted lines.
|
| So i see a 7.3 magnitude, and since i no longer deal with
| earthquakes (just floods, hurricanes, and tornadoes), i have
| no frame of reference for how bad that is. Gauging off the
| running joke above, it's gotta be somewhat bad, right?
| crazcarl wrote:
| I'm no expert, but it looks like the Apple Valley big
| earthquakes were centered on land, and these Fukushima are
| centered off the coast. I would assume the closer to the
| center, the worse the damage, so perhaps that could explain
| it?
| bithavoc wrote:
| Do we have to worry about the nuclear plant? Is it still active?
| mark-r wrote:
| No, I don't think that plant will ever be active again. There
| might be a danger if a tsunami came through again and washed
| more radioactive debris out from where it settled.
| npteljes wrote:
| It's not active.
|
| https://en.wikipedia.org/wiki/Fukushima_Daini_Nuclear_Power_...
| amelius wrote:
| We do have to worry about the nuclear agency that allowed it to
| be built there in the first place ...
| Kuinox wrote:
| Tsunami advisory:
| https://www.data.jma.go.jp/multi/tsunami/index.html?lang=en
| prpl wrote:
| less than 1 week difference 11 years later.
| darkteflon wrote:
| That was big. First time since the 2011 quake that I actually put
| the emergency backpack on. Another 10 seconds and I reckon we
| would have woken our son and headed outside.
| 88840-8855 wrote:
| what is the emergency backpack?
| alephnan wrote:
| https://www.nhk.or.jp/sonae/en/goods/index.html
| ihumanable wrote:
| They also sell these in the US as well.
|
| Products like this
|
| https://www.homedepot.com/p/Ready-America-2-Person-3-Day-
| Eme...
|
| They are good to have if you live in an area with natural
| disasters, 5-year shelf life and you just keep it somewhere
| that you can quickly grab if you ever need to evacuate.
| heavenlyblue wrote:
| HTTP Access denied from UK
| hedora wrote:
| Thank you! These are actually in stock locally and seem way
| more practical than the prepper food buckets.
| [deleted]
| coobird wrote:
| It was two earthquakes -- one "small" one and another "big" one
| that followed about a minute later.
|
| On TV, they were announcing the quake intensity of the first one
| and and there was a video feed of the Fukushima nuclear plant, as
| they usually do when there's a strong quake in that area. A
| moment later, the feed was shaking violently -- I thought it was
| a replay of what was taken earlier, but it must have been the
| "big" one.
|
| In Tokyo, we felt the secondary wave of the first overlapping
| with the primary of the second, so it was disorienting and scary.
| Although the quake intensity itself wasn't serious in Tokyo.
| GolDDranks wrote:
| The big wasn't still very big here in Tokyo, but it felt weird.
| The shake was in different direction than usually, it's hard to
| describe. It also lasted quite long in detectable intensities,
| although the peak shake was over pretty quickly.
| numpad0 wrote:
| That's the transverse Secondary wave from a distant origin.
| It feels like you're suddenly put on a ship rather than like
| the ground exploded. I learned that anecdotally...
| coobird wrote:
| Well, seems like a Shinkansen derailed. It doesn't seem very
| serious as there's someone tweeting about it from inside that
| train...[1] There's also a tweet that the part of the overhead
| power line broke off and fell[2], so it may take a while to get
| back in service...
|
| [1]:
| https://twitter.com/tokimemo1130/status/1504110997732139024
|
| [2]: https://twitter.com/R19i90/status/1504112207746936832
| hanselot wrote:
| graderjs wrote:
| Largest quake in at least a year in Japan. Also strangely almost
| exactly 12 months since a 7.0 in the very same area (20 March
| 2021):
| https://earthquake.usgs.gov/earthquakes/eventpage/us7000dl6y...
| kijin wrote:
| The infamous 2011 earthquake was also in March. Is there any
| plausible reason for earthquakes to occur in the same region
| around the same time of year over and over again, or is it just
| coincidence? I don't think Japan has any large glaciers that
| could melt in the spring and shift the center of mass of the
| plate underneath, for example.
| pvaldes wrote:
| My guess would be that ice melting in the caps triggers a
| release tension cascade in several parts of the crust, but is
| just a feeling. Less weight in the poles could make the
| planet tend to go more "sphaerical".
|
| Just my own stupid theory. I'm not a geologist and could be
| wrong by a mile.
| pvaldes wrote:
| In any case since several years ago I have noticed a sort
| of end of the winter pattern: Eyjafjallajokull (2010),
| Fukushima (2011), Villarica Chile (2015), Fagradalsfjall
| (2021), New Zealand earthquakes (2022)... all in March.
|
| And then is a waterfall later travelling towards equator:
| Volcan de Fuego Guatemala (may 2012). Feels a little like a
| tennis play with eruption waves bouncing, but maybe I'm
| just cherry picking facts together.
| [deleted]
| toyg wrote:
| Maybe something to do with orbital forces / sea currents...?
| graderjs wrote:
| Great question. 1/12 x 1/12 x 1/12 -- odds seem kind of
| low...but could possibly be related to ocean currents,
| seasonal flow systems probably significantly shift the center
| of mass of large bodies of water, maybe related to
| temperature.
| corpMaverick wrote:
| Interestingly the two biggest earthquakes in my memory in
| Mexico City happened in the same day. Sept 19 1985 and 2017
|
| Every year in Sep 19 there is a city wide simulacro. And
| then in 2017 an earthquake happened for real.
| wilihybrid wrote:
| Probabilities and statistics don't work like that. Between
| 2011 and now there's been loads of earthquakes in Japan, in
| most months, many stronger than 7.0.
| danuker wrote:
| Maybe thermal expansion, since March means warming after
| winter.
| 88840-8855 wrote:
| 20 meters under ground there is already no temperature
| difference between summer and winter.
| MrYellowP wrote:
| Right on schedule.
| andy_ppp wrote:
| It looks very close, is a tsunami possible?
| maybe_pablo wrote:
| 1m rise is expected, said the news.
| geerlingguy wrote:
| Yes: https://tsunami.gov/?p=PHEB/2022/03/16/22075004/1/WEPA40
|
| Also, from Japan:
| https://www.jma.go.jp/bosai/map.html#5/38.411/143.174/&elem=...
|
| It _looks_ like the tsunami 's arrival will be before high
| tide, so at least they have that going for them...
| vesrah wrote:
| edit: Misread, I apologize
| fredoliveira wrote:
| It is. I think you misread the previous comment. Tsunami
| will hit _before_ the high tide, resulting in less
| potential for flooding.
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