12/28/2016, M4.0 event near Morongo Valley
- 28 Dec 2016 09:56:59 PST, (34.152, -116.707), depth 10.1km, 16km NW of Morongo Valley, California
- Aftershocks: so far there have been 7 aftershocks recorded. More may be expected in the next few days, the largest expected is approximately 1 magnitude unit smaller than the mainshock. There is a small chance (about 5%) that a larger quake could occur, with the likelihood decreasing over time.
- Historical seismicity: since our records began in 1932 we’ve had 2 events of M4 or greater within 10km of today’s event, the largest was M4.8 (30 Jun 1992).
- Nearby faults: Santa Ana fault zone (Santa Ana fault) (4.2 km), Pinto Mountain fault zone (Pinto Mountain fault) (8.6 km), San Gorgonio Mountain fault (8.9 km), Helendale-South Lockhart fault zone, northern San Bernardino Mountains section (9.0 km), San Andreas fault zone, San Bernardino Mountains section (Mill Creek fault) (9.9 km), Pipes Canyon fault (10.3 km) and San Andreas fault zone, San Bernardino Mountains section (Mission Creek fault) (11.3 km).
- Links for: USGS earthquake page, ShakeMap, DYFI.
- Visit our special reports page for further information on local notable earthquakes.