Earthquake · reviewed by a seismologist
M 1.6ml
21km NE of Primo Tapia, B.C., MX
Yes. A magnitude 1.6 earthquake was recorded 21km NE of Primo Tapia, B.C., MX, 63 km (39 mi) SE of San Diego, CA, at 10:29 pm PDT on 28 August 2019 (05:29 UTC), 14 km deep.
63 km (39 mi) SE of San Diego, CA · 40 km (25 mi) SE of Chula Vista, CA
- When
- Magnitude
- M 1.6 (ml)
- Depth
- 14 km below the surface
- Felt
- no reports yet
- Nearest
- San Diego County, 75 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2633 days ago
Earthquake alerts for Campo, 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 it was probably too small to be felt, even directly above it. 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 7.3 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 2,100,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
- Around the size people start to feel M 3.0 130× the energy of this one
- This earthquake M 1.6 about 7.3 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 32.3482, -116.7502. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Diego County, CA | 75 km (47 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
46 earthquakes have been recorded within 50 km since this one.
- 1.7 2km SSW of San Ysidro, CA
- 1.5 17km NNE of Primo Tapia, B.C., MX
- 1.8 7km SE of Bonita, CA
- 1.7 7km ESE of Chula Vista, CA
- 2.9 10km SSW of Primo Tapia, B.C., MX
- 2.0 9km SSW of Primo Tapia, B.C., MX
- 2.1 15km SSE of Primo Tapia, B.C., MX
- 1.9 32km NE of Ensenada, B.C., MX
- 1.6 5km ESE of Bonita, CA
- 1.8 14km ESE of Primo Tapia, B.C., MX
- 1.5 6km SE of Bonita, CA
- 1.5 6km ESE of Chula Vista, CA
- 1.6 5km NE of Rancho San Diego, CA
- 1.7 41km SSE of Tecate, B.C., MX
- 1.7 22km NNE of Primo Tapia, B.C., MX
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.