Earthquake · reviewed by a seismologist
M 5.9mww
39 km WSW of Tambolaka, Indonesia
- When
- Magnitude
- M 5.9 (mww)
- Depth
- 46 km below the surface
- Felt
- 4 reports · strongest reported intensity V
- Measured shaking
- intensity V (ShakeMap)
- USGS impact alert
- green
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1 hour ago
A magnitude 5.9 earthquake was recorded 39 km WSW of Tambolaka, Indonesia at 22:55 UTC on 2026-10-03. 4 people have reported feeling it to USGS. This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre.
How big was it?
This earthquake released about 11 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.9 would have released about 32 times as much.
- Ridgecrest, California 2019 M 7.1 63× the energy of this one
- Loma Prieta, California 1989 M 6.9 32× the energy of this one
- Northridge, California 1994 M 6.7 16× the energy of this one
- This earthquake M 5.9 about 11 kilotons of TNT
- Mineral, Virginia 2011 M 5.8 this one released 1.4× more
- Magna, Utah 2020 M 5.7 this one released 2× 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 -9.5672, 118.9078. 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 | 3 | 4 | |
| felt reports | 2 | 3 | |
| felt reports | 1 | 2 | |
| impact alert | not reported | green | |
| measured intensity | not reported | 5.15 | |
| reported intensity | not reported | 4.5 | |
| felt reports | not reported | 1 |
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.