M2.8 earthquake 47 km NNE of Mammoth Lakes, California, United States
A magnitude 2.8 earthquake struck 47 km NNE of Mammoth Lakes, California, United States at 19:51 local time (02:51 UTC) on 8 Oct 2026, at a depth of 16 km, according to USGS. The solution is preliminary and may be revised.
Data: USGS · updated 2026-10-09 02:52 UTC · automatic solution
- Magnitude
- 2.8micro
duration magnitude (md) - Depth
- 16.1 km
- Status
- Automatic
- Origin time
- 2026-10-09 02:51:03 UTC
- Local: 8 Oct 2026, 19:51:03 (America/Los Angeles)
- Epicentre
- 38.026° N, 118.727° W
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Circles show this event and others within 30 km from 7 days before to 30 days after. Lines: plate boundaries and GEM active faults. Open on the live map
Nearby places
| Place | Distance | Est. shaking |
|---|---|---|
| Mammoth LakesCalifornia, United States · pop. 7,946 | 47 km | INot felt |
| Gardnerville RanchosNevada, United States · pop. 11,312 | 130 km | INot felt |
| South Lake TahoeCalifornia, United States · pop. 21,706 | 148 km | INot felt |
| FresnoCalifornia, United States · pop. 542,107 | 169 km | INot felt |
| RenoNevada, United States · pop. 264,165 | 192 km | INot felt |
| StocktonCalifornia, United States · pop. 305,658 | 225 km | INot felt |
| SacramentoCalifornia, United States · pop. 524,943 | 249 km | INot felt |
| San JoseCalifornia, United States · pop. 997,368 | 289 km | INot felt |
Shaking is an estimate from the intensity prediction equation of Allen, Wald & Worden (2012), not an observation. Local ground and buildings can change it by a level or more.
Every agency's solution
Agencies locate earthquakes with their own stations and methods, so their numbers differ. We match reports of the same event by time, distance and magnitude and show them side by side. The headline uses USGS · NC.
| Agency | Magnitude | Depth | Epicentre | Time offset | Status |
|---|---|---|---|---|---|
| USGS · NCheadlineNorthern California Seismic System via U.S. Geological Survey | 2.8 md | 16.1 km | 38.03° N, 118.73° W | – | Automatic |
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How big was it?
Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.
It released roughly the energy of 247 kg of TNT. Magnitude is logarithmic: each whole step means about 32 times more energy and 10 times larger waves on a seismogram. Depth matters too: at 16 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.
M2.8 releases about 33× the energy of M1.8, and its waves are about 10× taller on a seismogram. Energy: 247 kg of TNT vs 8 kg of TNT.
Each square is the energy of one M1.8. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
No later earthquakes have been recorded within 30 km so far. 2 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Did you feel it?
Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.
Reports on SeismoAtlas
No reports yet.
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Event id nc75446746. First recorded here 9 Oct 2026, 02:54:29 UTC. Solutions: USGS · NC (usgs:nc75446746). Cite as: SeismoAtlas, “M2.8 earthquake 47 km NNE of Mammoth Lakes, California, United States”, https://seismoatlas.com/earthquake/nc75446746-m2-8-earthquake-47-km-nne-of-mammoth-lakes-california-united-states, data from USGS.
JSON: /api/v1/events/nc75446746. SeismoAtlas is not an official warning service.