[Currently a 7.4 at a depth of 35km according to the USGS](https://earthquake.usgs.gov/earthquakes/eventpage/us6000sri7/executive)
8
Internal_Necro472 days ago
+4
That's odd I was listening to the NHK broadcast translated by humans this morning they lowered the depth to 19km from 10 and increased the magnitude to.7.7.
4
Osiris322 days ago
+9
Epicenter data often changes in the hours after a quake, as more data from seismometers comes in and is interpreted. Plus, with something as big as a mid 7, it's not really an epi*center,* more like "this area several kilometers across just moved all at once."
9
Drywesi1 day ago
+2
This, and we'll probably have a firm number sometime next week.
2
Warcraft_Fan1 day ago
+1
Also different centers can interpret the number differently. US and Japan may not agree on a number so we'll always get +/- a few tenths.
1
Osiris321 day ago
+2
It's not a tenth, the scale is logarithmic. Going up one whole number increases the amplitude of the quake by tenfold and the energy output by 30-fold.
2
Warcraft_Fan1 day ago
+2
I meant the tenth as in 7.4 or 7.5.
2
Internal_Necro471 day ago
+2
Y'all are earthquake nerds in the best way possible lol. I just listened to NHK Tokyo at work and they said 7.4 then reevaluated it to a 7.8 it was an Upper 5 in Japan but I'm not sure what that means entirely. A different scale I suppose.
2
Osiris321 day ago
+2
I come by it honestly, my father is a retired geologist who worked on the eruptions of St Helens and Pinatubo. I was learning about plate tectonics and the difference between P and S waves when my friends were learning about D*** and Jane doing something with a dog.
2
DaveTheWraith2 days ago
+18
wow, bloody hell.
18
VaginaBurner692 days ago
+57
Fingers crossed it’s not severe. 🤞
57
HeirophantGreen2 days ago
+166
That was a long one. Sitting in an office in Tokyo on the 17th floor and the building swayed a bit.
A good portion of my colleagues left for the day within 15 min of the quake. I guess a force of nature is required to cut short their overtime.
166
za722 days ago
+16
how does it compare to the 2011 quake?
16
HeirophantGreen2 days ago
+24
Not close to the intensity or duration. But it has been a good reminder to check emergency supplies at home.
24
notasrelevant2 days ago
+16
Due to the way magnitude works, it's a massive difference. 2011 was a 9.1, while today was a 7.5. Seems like a small difference, but...
The 2011 would have been 250 times the amount of energy as today's. So is not even close to being as bad. With no tsunami, this one will likely have minimal damage or casualties.
16
za722 days ago
+5
oh wow... that's a BIG difference!
5
YJSubs2 days ago
+76
NHK Live streaming.
https://www.youtube.com/live/f0lYkdA-Gtw
76
Fall_Harvest2 days ago
+7
The channel seems to be offline or "Be back soon." Heres one from 2 hours ago with footage for those not able to view the live stream.
[https://www.youtube.com/live/QmrUr0JS2uE](https://www.youtube.com/live/QmrUr0JS2uE)
7
roarroarrora2 days ago
+7
Thank you so much for this.
7
BaseRape2 days ago
+38
Initial waves 40cm. Expected 3m
38
Scotsch2 days ago
+28
Current highest is 80cm.
28
whoamiamawho2 days ago
-9
It's unfortunate we don't have better instruments to predict the tsunami size after the quakes. I'm concerned there's going to be a "boy who cried wolf" effect when they keep calling for evacuation and then no damage occurs.
-9
raevnos2 days ago
+23
Sounds like the Iwate coast was just hit with up to 3m tsunami waves.
23
Melonary2 days ago
+23
NHK is saying that's the predicted warning, but the observed ones so far have been 80cm at highest. Still powerful (80cm is not 3m, but still a very powerful force of water).
And they can increase, so there may still be 3m waves. That's why they have the prediction there, to warn people waves are still predicted to increase in size and strength.
23
WaffleFangStorm2 days ago
+68
Japan hearing “tsunami warning” again is instant anxiety. Hope it’s mostly precaution and everyone heads uphill fast. If you’ve got friends there, maybe nudge them to keep phones charged and radios on.
68
mistersmiley3182 days ago
+3
The people of Tōhoku have suffered enough. Here's hoping all of the measures put in place since 2011 work as designed
3
Melonary2 days ago
+16
Wild to think this may be yet another hypothesized/concluded aftershock of the 2011 Tōhoku earthquake. They're still going.
It may not be as well, but it's certainly not an unlikely possibility - look up a list of possible and confirmed aftershocks if you're curious.
Hope the tsunami stays smaller than predicted and people are safe.
16
kyuuri1172 days ago
+7
Initially sounds wild, but the earth measures it's time way differently than we measure ours. The scales just aren't comparable.
7
ExpiredExasperation2 days ago
+7
Hope it's just a cautionary thing.
7
christhefirstx2 days ago
-9
The tsunami warnings are usually pretty accurate once issued
-9
Zubon1022 days ago
+22
They are absolutely cautionary.
Every time there is a largeish earthquake here, there is a fairly good chance they also issue a tsunami warning. But there hasn't been an actual significant tsunami in the last 15 years.
22
christhefirstx2 days ago
-2
Ah I see I live pretty close to the coast and have only lived here for a short amount of time so good to know
-2
JMEEKER862 days ago
-2
Yeah, they forecast 3m for this 7.5 when even an 8 will typically only produce a 1m wave. To produce a 3m wave you would typically have to have at least an 8.3 or so. Really tall tsunamis are very rare and from only the strongest quakes. This is a rather typical earthquake that happens a couple times per year in the area.
-2
Nervous-Tour-8842 days ago
+5
It really just depends on the kind of earthquake. Many are primarily horizontal shearing, and horizontal shearing don't really cause tsunamis.
5
Geocacher69072 days ago
+6
Praying that everyone is okay.
6
Scare_D2 days ago
+2
I pray to god that no lives are lost.
2
vishalnegal1 day ago
+1
Hearing “tsunami warning” in Japan again immediately brings a wave of anxiety. Hopefully it’s just a precaution, and people move to higher ground quickly. If you know anyone there, it might be a good idea to remind them to keep their phones charged and stay tuned to updates.
1
D_Winds2 days ago
+1
Why did I have to start watching The Days on Netflix this weekend...
41 Comments