Earthquake · reviewed by a seismologist
M 6.9mww
central Mid-Atlantic Ridge
Yes. A magnitude 6.9 earthquake was recorded in the central Mid-Atlantic Ridge at 12:23 UTC on 2026-10-13, 10 km deep. No felt reports to USGS yet.
- When
- Magnitude
- M 6.9 (mww)
- Depth
- 10 km below the surface
- Felt
- no reports yet
- USGS impact alert
- green
- Tsunami
- USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1 hour 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, people at rest would likely notice it out to about 556 km (345 mi) from the epicentre. 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 340 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 7.9 would have released about 32 times as much.
- Tōhoku, Japan 2011 M 9.1 2,000× the energy of this one
- San Francisco 1906 M 7.9 32× the energy of this one
- Ridgecrest, California 2019 M 7.1 2× the energy of this one
- This earthquake M 6.9 about 340 kilotons of TNT
- Northridge, California 1994 M 6.7 this one released 2× more
- Mineral, Virginia 2011 M 5.8 this one released 45× 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.
Where
Epicentre -0.4016, -19.4151. 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 |
|---|---|---|---|
| impact alert | not reported | green | |
| measured intensity | not reported | 0 |
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.