Earthquake · reviewed by a seismologist
M 1.6ml
9km SSW of Holtville, CA
- When
- Magnitude
- M 1.6 (ml)
- Depth
- 10 km below the surface
- Felt
- no reports yet
- Nearest
- Imperial County, 34 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2781 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
How big was it?
This earthquake released about 8.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,800,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
- Around the size people start to feel M 3.0 110× the energy of this one
- This earthquake M 1.6 about 8.4 lb of TNT
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 32.7395, -115.4178. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Imperial County, CA | 34 km (21 mi) | S of here | earthquakes near Imperial County |
| Riverside County, CA | 123 km (76 mi) | SSE of here | earthquakes near Riverside County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
47 earthquakes have been recorded within 50 km since this one.
- 2.3 7km WSW of Holtville, CA
- 1.6 18km WNW of Progreso, B.C., MX
- 1.6 22km SW of Westmorland, CA
- 2.0 8km ENE of Puebla, B.C., MX
- 1.6 7km W of Holtville, CA
- 2.1 6km NNW of Delta, B.C., MX
- 1.9 7km WSW of Holtville, CA
- 1.9 6km NNW of Progreso, B.C., MX
- 2.4 7km SW of Holtville, CA
- 2.0 8km SE of Puebla, B.C., MX
- 1.9 8km ESE of Puebla, B.C., MX
- 2.3 12km W of Delta, B.C., MX
- 2.0 11km NW of Delta, B.C., MX
- 1.7 17km WSW of Delta, B.C., MX
- 2.0 4km ESE of Westmorland, CA
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.
For this area
The largest earthquake within 50 km in our catalogue was M 4.4 on 2018-09-29 — it released about 15,000 times the energy of this one.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
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.