Earthquake · reviewed by a seismologist
M 6.0mww
58 km SSE of Shima, Japan
Yes. A magnitude 6.0 earthquake was recorded 58 km SSE of Shima, Japan at 22:15 UTC on 2026-10-31, 352 km deep. 29 people have reported feeling it to USGS.
- When
- Magnitude
- M 6.0 (mww)
- Depth
- 352 km below the surface
- Felt
- 29 reports · strongest reported intensity III
- Measured shaking
- intensity III (ShakeMap)
- USGS impact alert
- green
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 28 hours ago
This was a strong earthquake. Damage is likely near the epicentre and it is felt over a wide area.
At this magnitude and depth it was probably too small to be felt, even directly above it. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
How big was it?
This earthquake released about 15 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 7.0 would have released about 32 times as much.
- Ridgecrest, California 2019 M 7.1 45× the energy of this one
- Loma Prieta, California 1989 M 6.9 22× the energy of this one
- Northridge, California 1994 M 6.7 11× the energy of this one
- This earthquake M 6.0 about 15 kilotons of TNT
- Mineral, Virginia 2011 M 5.8 this one released 2× more
- Magna, Utah 2020 M 5.7 this one released 2.8× more
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
The largest earthquake within 50 km in our catalogue was M 4.7 on 2026-09-20.
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 33.8220, 136.9854. Map © OpenStreetMap contributors.
Aftershocks so far
No further earthquakes have been recorded within 50 km since this one.
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
Revisions
USGS refines a solution as more stations report. Every change we have seen is listed here.
| What changed | From | To | When |
|---|---|---|---|
| felt reports | 28 | 29 | |
| felt reports | 27 | 28 | |
| felt reports | 26 | 27 | |
| felt reports | 25 | 26 | |
| felt reports | 23 | 25 | |
| felt reports | 22 | 23 | |
| felt reports | 21 | 22 | |
| felt reports | 20 | 21 | |
| felt reports | 19 | 20 | |
| felt reports | 18 | 19 | |
| felt reports | 17 | 18 | |
| felt reports | 16 | 17 |
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.