1947 Satipo earthquake

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1947 Satipo earthquake
1947 Satipo earthquake is located in Peru
1947 Satipo earthquake
UTC time1947-11-01 14:58:57
ISC event898103
USGS-ANSSComCat
Local dateNovember 1, 1947 (1947-11-01)
Local time09:58:57
Magnitude7.6 Ms
Depth20 km
Epicenter10°58′23″S 74°43′30″W / 10.973°S 74.725°W / -10.973; -74.725Coordinates: 10°58′23″S 74°43′30″W / 10.973°S 74.725°W / -10.973; -74.725
Areas affectedPeru
Max. intensityIX (Violent)
TsunamiNone
LandslidesYes
Casualties233–2,233 dead[1][2]

The 1947 Satipo earthquake occurred on November 1 at 09:58:57 local time with an epicenter in the Peruvian Amazon jungle in the Department of Junín. The earthquake has an estimated surface wave magnitude of Ms  7.6 and a shallow focal depth of 20 km.[3]

The earthquake produced 45 to 60 seconds of violent ground shaking in the Department of Junín, and was felt by many individuals within a 1.3-million-square-kilometer area. A maximum Modified Mercalli intensity of VIII (Severe) to IX (Violent) was assigned to an area estimated to be 4,000 km² in size. The peak ground acceleration was calculated at 309 mm/s² in Satipo, based on evaluating the damage to a brick pilar. In the city of Lima, 240 km from the epicenter, the earthquake caused light to weak shaking corresponding to IV (Light) or III (Weak).[4]

An aerial survey over the affected area found a large number of small-scale landslides and destroyed vegetation near the . Parts of a highway were buried under landslide debris. Approximately 233 to 2,233 people in Satipo Province lost their lives during the earthquake.[1][2]

The earthquake destroyed or seriously damaged 63% of all adobe constructed homes in La Merced. Another 36% of the homes suffered moderate damage, while the remaining 1% had no damage. Most reinforced concrete homes withstood the earthquake shaking, although some were reportedly cracked. At least half of all limestone buildings were destroyed by the quake. In Satipo, the earthquake collapsed an entire school complex.[4]

See also[]

References[]

  1. ^ a b "Terremoto de 1947". El Comercio. Retrieved 24 August 2021.
  2. ^ a b L.M. Murphy (1984). "United States Earthquakes, 1947" (Open-File report 84-947). Open-File Report. U.S. Geological Survey (84–947). doi:10.3133/ofr84947.
  3. ^ "M 7.6 - 18 km ESE of Santa Rosa, Peru". earthquake.usgs.gov. U.S. Geological Survey. Retrieved 24 August 2021.
  4. ^ a b Enrique Silgado Ferro (1948). "Datos sismológicos del Perú 1947". Boletín del Instituto Geológico del Perú. Instituto Geológico del Perú. 11.

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