Major M7.1 Earthquake Strikes Japan; "Megaquake" Alert Issued

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Published 2024-08-08
A major magnitude 7.1 earthquake just struck a mere 3 miles offshore of Japan. This generated a tsunami, and caused the ground to shake for 22 seconds. Alongside this, an alert was issued which warned of an increased likelihood of an even larger megathrust earthquake occurring from the Nankai subduction zone. However, I believe this alert to be misleading, which I will explain in today's video.

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Thumbnail Photo Credit: Google Earth, Image Landsat / Copernicus, Data SIO, NOAA, U.S. Navy, NGA, GEBCO, Data LDEO-Columbia, NSF, NOAA. This image was overlaid with text, and overlaid with GeologyHub made graphics (the image border & the GeologyHub logo).

A special thanks to the EarthquakeSim YouTube channel for granting me permission to use clips of his footage!
Video Sources from the EarthquakeSim YouTube channel:
[1]    • Earthquake SIZE Comparison - 3D OFFIC...  
Subscribe to EarthquakeSim at:    / @earthquakesim  

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Sources/Citations:
[1] U.S. Geological Survey
[2] Japanese Meteorological Agency
[3] Pacific Tsunami Warning Center

0:00 Major Earthquake Strikes
0:24 Megaquake Alert
0:53 Alert, Explained
1:21 Geologic Setting
2:12 Aftershocks
2:40 Damage
3:49 Possible Liquefaction?

All Comments (21)
  • @GeologyHub
    I believe that the “mega quake” alert is a bit misleading.
  • @scrappydoo7887
    Thank you geo hub for the concise update without the usual fear of many other channels
  • @HomesteadJapan
    I think the megaquake alert serves largely to tell people to make sure their disaster plans and supplies are all up-to-date and stocked properly. I live just outside of where the 2011 tsunami reached (it occurred before I lived in Japan so I was not here for it), so it's definitely on our minds.
  • @Aquilae-eo4bl
    I hope there will be no big earthquake soon and everyone will be safe
  • @ronaldperez9606
    Man I was waiting for your video about this earthquake. Yours are the best.
  • I’m still wondering about the 5.2 quake that occurred yesterday in Lamont / Grapevine CA that generated some interesting after shocks.
  • @xwiick
    Thanks for all the hard work on these videos!
  • @dmdrosselmeyer
    By far the best geology content on YouTube🙏 Been a fan for years, thank you!
  • @PsyloSatan
    This is the first place I heard about it. fast work!
  • Great work. Your summaries are excellent - concise and straight to the point. YOu are one of the best.
  • @equarg
    I heard there was a quake, but I decided to wait till you posted to avoid the hysterical posts. Thank you!
  • @baileyw0604
    dude i love your videos so much, they're so informational and I always learn so much from them and I love knowing about geological things around the world when they happen because its interesting and important to be aware of your surroundings even if not immediate.
  • I really appreciate how you explained that, about the chances. Nicely done.
  • @fwiffo
    If that 2.9% is actually representative, that's a significant increased risk. A typical random week out of the year does not have nearly a 3% chance of an 8+ magnitude earthquake.
  • I live an hour away from the epicenter, we had a violent lightning storm come through just before the quake . I normally don’t mind quakes or lightning storms but both were so violent.