Light mag. 3.1 earthquake - 25 mi east of Ramona, San Diego County, California, USA, on Friday, 19 Mar 2021 11:24 am (GMT -7) -
Light magnitude 3.1 earthquake at 7 km depth
19 Mar 18:27 UTC: First to report: EMSC after 3 minutes.
19 Mar 18:27: Now using data updates from USGS
19 Mar 21:54: Hypocenter depth recalculated from 6.7 to 6.6 km (from 4.2 to 4.1 mi).
Update Fri, 19 Mar 2021, 18:33Small magnitude 3.1 quake hits 25 miles east of Ramona, California, United States in the morning
3.1 quake 19 Mar 11:24 am (GMT -7)
A very shallow magnitude 3.1 earthquake was reported in the morning near Ramona, San Diego County, California, USA.
According to the United States Geological Survey, the quake hit on Friday 19 March 2021 at 11:24 am local time at a very shallow depth of 4.2 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 3.1 earthquake as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Julian (pop. 1,500) located 10 miles from the epicenter. In Ramona (pop. 20,300, 25 miles away), Santee (pop. 57,800, 34 miles away), El Cajon (pop. 103,700, 34 miles away), Poway (pop. 50,200, 35 miles away), Escondido (pop. 151,500, 38 miles away), San Marcos (pop. 92,900, 43 miles away), Chula Vista (pop. 265,800, 46 miles away), and San Diego (pop. 1,394,900, 47 miles away), the quake was probably not felt.
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Date & time: 19 Mar 2021 18:24:36 UTC -
Local time at epicenter:
Friday, 19 Mar 2021 11:24 am (GMT -7)
Depth: 6.6 km
Epicenter latitude / longitude: 33.03167°N / 116.442°W
, United States
Nearest volcano: Salton Buttes
(79 km / 49 mi)
Nearby towns and cities:16 km (10 mi) ESE of Julian
(pop: 1,500) --> See nearby quakes!40 km (25 mi) E of Ramona (San Diego County)
(pop: 20,300) --> See nearby quakes!49 km (30 mi) ENE of Lakeside (San Diego County)
(pop: 20,600) --> See nearby quakes!54 km (34 mi) ENE of Santee
(pop: 57,800) --> See nearby quakes!55 km (34 mi) ENE of El Cajon
(pop: 103,700) --> See nearby quakes!56 km (35 mi) E of Poway
(pop: 50,200) --> See nearby quakes!61 km (38 mi) E of Escondido
(pop: 151,500) --> See nearby quakes!69 km (43 mi) E of San Marcos
(pop: 92,900) --> See nearby quakes!76 km (47 mi) ENE of San Diego
(pop: 1,394,900) --> See nearby quakes!767 km (477 mi) SE of Sacramento
(pop: 490,700) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 15.7°C
(60 F), humidity: 44%, wind: 2 m/s (4 kts) from W
Primary data source: USGS
(United States Geological Survey)
Estimated released energy: 2.8 x 109
joules (783 kilowatt hours, equivalent to 0.674 tons of TNT) More info
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.
|3.1||6.6 km||16km ESE of Julian, CA, USA||USGS|
|3.1||7 km||SOUTHERN CALIFORNIA, USA||EMSC|
User reports for this quake (2)
Pine Valley / Light shaking (MMI IV) / single lateral shake / 2-5 s
MOHALI / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s
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