Major mag. 7.1 earthquake - Hector Mine, CA Earthquake (USA) on Saturday, 16 October 1999
Magnitude: 7.1
Depth: 13.7 km
Epicenter latitude / longitude: 34.60333°N / 116.265°W
(United States)Nearest volcano: Lavic Lake (37 km / 23 mi)
Nearby towns and cities:
52 km (33 mi) N of Joshua Tree (pop: 7,400)
56 km (34 mi) NW of Twentynine Palms (pop: 26,000)
57 km (35 mi) NE of Yucca Valley (pop: 21,600)
174 km (108 mi) NE of Anaheim (pop: 350,700)
192 km (119 mi) NE of Los Angeles (pop: 3,971,900)
200 km (124 mi) NE of Long Beach (pop: 474,100)
Primary data source: USGS
Estimated released energy: 2.8 x 1015 joules (783 gigawatt hours, equivalent to 6.7 x 105 tons of TNT or 42.1 atomic bombs!) [learn more]
Data for the same earthquake reported by different agencies
Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
| Time | Mag. / Depth | Location | Source |
| Sat, 16 Oct 09:46 UTC | M 7.1 / 13.7 km | Hector Mine, CA Earthquake (USA) | USGS |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake yet. If you felt it be the first to report it!
Aftershocks of the 7.1 quake: Hector Mine, CA Earthquake (USA), 16 Oct 1999 09:46
More info
Recorded aftershocks, latest first (2 quakes):- 16 Oct 1999 12:57 UTC| M 5.4 |0.8 km (0.5 mi) depth|18 km (11 mi) distance| USGS | Details
- 16 Oct 1999 09:59 UTC| M 5.6 |6 km (3.7 mi) depth|82 km (51 mi) distance| USGS | Details
Earlier earthquakes in the same area
Major mag. 7.1 earthquake - Hector Mine, CA Earthquake (USA) on Saturday, 16 October 1999Click here to search our database for earlier earthquakes in the same area since 1900!
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