Earthquake · reviewed by a seismologist
M 4.6mwr
36 km SE of Hualien City, Taiwan
- When
- Magnitude
- M 4.6 (mwr)
- Depth
- 19 km below the surface
- Felt
- 1 report · strongest reported intensity IV
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 56 minutes ago
This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 1 person has reported feeling it to USGS.
How big was it?
This earthquake released about 120 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.6 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 1,400× the energy of this one
- Mineral, Virginia 2011 M 5.8 63× the energy of this one
- Magna, Utah 2020 M 5.7 45× the energy of this one
- This earthquake M 4.6 about 120 tons of TNT
- Around the size people start to feel M 3.0 this one released 250× 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.
Revisions
USGS refines a solution as more stations report. Every change we have seen is listed here.
| What changed | From | To | When |
|---|---|---|---|
| reported intensity | not reported | 3.8 | |
| felt reports | not reported | 1 |
Where
Epicentre 23.7020, 121.8063. 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.
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.