I attempted a search to try to determine the locations of any seismographs that Japan Meteorological Agency may have permanently installed in that immediate area, but I failed to learn of them. Presuming you may know, when this swarm/sequence began and progressed was JMA capable of accurately determining whether there could be any tremor at all associated with this activity. The volcanic nature of this entire feature of islands inclines one to not unjustifiably be suspicious of magma as a cause, or dismiss it with cause.
Thanks for this, I was anticipating your post on this swarm, and you gave us some very beautiful plots and analysis. It seems clear from the bathymetry that new "baby" Takara Islands are also being birthed beneath the waves, likely the same kinds of activity preceded the appearance of the present islands. Perhaps the primary risk concern is not a large earthquake, but rather a volcanic eruption.
We have dealt with earthquake swarms in southern Ryukyu: Int J Earth Sci (Geol Rundsch) (2017) 106:959–965, DOI 10.1007/s00531-016-1344-x (Shallow earthquake swarms in southern Ryukyu area: manifestation of dynamics of fluid and/or magma plumbing system revealed by teleseismic and regional datasets; authors Ales Spicak and Jiri Vanek)
Thank you for this information. I’ve been watching this “swarm” on my weather app and have been wondering what is going on. Guess we’re in the wait-and-see period…
What is the copyright status of the JMA bulletin? Just wrote this:
https://en.wikipedia.org/wiki/Tokara_Islands_July_2025_earthquake_swarm
thank you for this article. Yes, it seems to be another activity as the swarm north of Santorini this year.
Hi, could you perhaps consider joining the channel GeologyHub
Drs Bradley/Hubbard
I attempted a search to try to determine the locations of any seismographs that Japan Meteorological Agency may have permanently installed in that immediate area, but I failed to learn of them. Presuming you may know, when this swarm/sequence began and progressed was JMA capable of accurately determining whether there could be any tremor at all associated with this activity. The volcanic nature of this entire feature of islands inclines one to not unjustifiably be suspicious of magma as a cause, or dismiss it with cause.
Thanks for this, I was anticipating your post on this swarm, and you gave us some very beautiful plots and analysis. It seems clear from the bathymetry that new "baby" Takara Islands are also being birthed beneath the waves, likely the same kinds of activity preceded the appearance of the present islands. Perhaps the primary risk concern is not a large earthquake, but rather a volcanic eruption.
We have dealt with earthquake swarms in southern Ryukyu: Int J Earth Sci (Geol Rundsch) (2017) 106:959–965, DOI 10.1007/s00531-016-1344-x (Shallow earthquake swarms in southern Ryukyu area: manifestation of dynamics of fluid and/or magma plumbing system revealed by teleseismic and regional datasets; authors Ales Spicak and Jiri Vanek)
Thank you for this information. I’ve been watching this “swarm” on my weather app and have been wondering what is going on. Guess we’re in the wait-and-see period…