M 4.2 - 5km NW of Palomar Observatory, CA

  • 2023-04-01 01:16:07 (UTC)
  • 33.382°N 116.910°W
  • 13.0 km depth

PAGER

Contributed by US last updated 2023-04-24 04:51:38 (UTC)
  • The data below are the most preferred data available
  • The data below have NOT been reviewed by a scientist.
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Estimated Fatalities

Estimated Fatalities Histogram
Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.

Estimated Economic Losses

Estimated Economic Losses Histogram

Estimated Population Exposure to Earthquake Shaking

Population Exposure Map
Population per ~1 sq. km. from LandScan
Population Exposure
MMIShakingPopulation
I Not Felt 7,248 k*
II-III Weak 18,821 k
IV Light 265 k
V Moderate 0 k
VI Strong 0 k
VII Very Strong 0 k
VIII Severe 0 k
IX Violent 0 k
X Extreme 0 k

*Estimated exposure only includes population within map area (k = x1,000)
Modified Mercalli Intensity (MMI) scale

Structure Information Summary

Overall, the population in this region resides in structures that are resistant to earthquake shaking, though vulnerable structures exist. The predominant vulnerable building types are unreinforced brick masonry and reinforced masonry construction.

Secondary Effects

Recent earthquakes in this area have caused secondary hazards such as landslides and liquefaction that might have contributed to losses.

Selected Cities Exposed
MMICityPopulation
V Aguanga 1 k
IV Valley Center 9 k
IV Hidden Meadows 3 k
IV Anza 3 k
IV Bonsall 4 k
IV San Pasqual 2 k
III San Diego 1,307 k
II Tijuana 1,376 k
II Long Beach 462 k
II Los Angeles 3,793 k

From GeoNames Database of Cities with 1,000 or more residents (k = x1,000)