Earthquake · reviewed by a seismologist
M 1.6md
Earthquake near Merced, CA
USGS: 14 km SE of Catheys Valley, California
64 km (40 mi) NNW of Fresno, CA · 43 km (27 mi) NNE of Madera, CA
- When
- 6:30 am PDT on 12 October 2016 ()
- Where
- 45 km (28 mi) E of Merced, CA · earthquakes near Merced
- Magnitude
- M 1.6 (md)
- Depth
- 22 km below the surface
- Felt
- no reports yet
- Nearest
- Madera County, 25 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3521 days ago
A magnitude 1.6 earthquake was recorded 45 km (28 mi) E of Merced, CA, at 6:30 am PDT on 12 October 2016 (13:30 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: Mariposa, Ahwahnee, Midpines, Yosemite Lakes, Coarsegold, Le Grand.
How big was it?
This earthquake released about 7.6 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 2,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,400,000× 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 7.6 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.
For this area
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 37.3432, -119.9762. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Madera County, CA | 25 km (15 mi) | SE | earthquakes near Madera County |
| Mariposa County, CA | 26 km (16 mi) | NNE | earthquakes near Mariposa County |
| Merced County, CA | 68 km (42 mi) | WSW | earthquakes near Merced County |
| Fresno County, CA | 71 km (44 mi) | SSE | earthquakes near Fresno County |
| Tuolumne County, CA | 75 km (47 mi) | N | earthquakes near Tuolumne County |
| Stanislaus County, CA | 94 km (58 mi) | WNW | earthquakes near Stanislaus County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
51 earthquakes have been recorded within 50 km since this one.
- 2.1 20km S of Mariposa, CA
- 1.7 17km S of Bootjack, CA
- 1.6 18km W of Yosemite Lakes, CA
- 2.0 11km SSW of Bootjack, CA
- 1.9 2km E of Yosemite Lakes, CA
- 2.0 5km E of Yosemite Lakes, CA
- 1.9 5km E of Yosemite Lakes, CA
- 2.0 3km ENE of Yosemite Lakes, CA
- 3.1 10km NNE of Oakhurst, CA
- 1.7 21km SSW of Bootjack, CA
- 1.6 9km NE of North Fork, CA
- 2.4 11km NNW of Yosemite Lakes, CA
- 2.0 13km NW of Yosemite Lakes, CA
- 2.6 10km NNW of Yosemite Lakes, CA
- 1.9 8km SSW of Bootjack, 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.