Earthquake · reviewed by a seismologist
M 1.7ml
21km ENE of Rosarito, B.C., MX
Yes. A magnitude 1.7 earthquake was recorded 21km ENE of Rosarito, B.C., MX, 53 km (33 mi) SSE of San Diego, CA, at 11:53 pm PDT on 12 April 2020 (06:53 UTC), 11 km deep.
53 km (33 mi) SSE of San Diego, CA · 29 km (18 mi) SE of Chula Vista, CA
- When
- Magnitude
- M 1.7 (ml)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- San Diego County, 68 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1368 days ago
Earthquake alerts for Imperial Beach, CA
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 7 km (4 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 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
- Magna, Utah 2020 M 5.7 900,000× the energy of this one
- Around the size people start to feel M 3.0 80× the energy of this one
- This earthquake M 1.7 about 12 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 32.4155, -116.8295. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Diego County, CA | 68 km (42 mi) | N | earthquakes near San Diego County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
44 earthquakes have been recorded within 50 km since this one.
- 1.6 6km ESE of Chula Vista, CA
- 1.7 14km SW of Coronado, CA
- 1.8 6km SE of Bonita, CA
- 1.6 22km ESE of Primo Tapia, B.C., MX
- 1.6 8km ESE of Chula Vista, CA
- 1.9 24km ESE of Primo Tapia, B.C., MX
- 1.9 6km ESE of Chula Vista, CA
- 1.8 6km SE of Chula Vista, CA
- 2.0 14km SW of Coronado, CA
- 1.9 6km ESE of Chula Vista, CA
- 1.6 7km ESE of Bonita, CA
- 1.5 6km ESE of Chula Vista, CA
- 1.8 7km SE of Bonita, CA
- 1.8 7km ESE of Bonita, CA
- 1.8 6km ESE of Chula Vista, 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.
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.