November 1960 Peru earthquake
  Lima Arica  | |
| Date | November 20, 1960 |
|---|---|
| Origin time | 22:02 UTC [1] |
| Magnitude | 7.8 Mw [1] |
| Depth | 35 km (22 mi) [1] |
| Epicenter | 6°42′S 80°37′W / 6.70°S 80.62°W [1] |
| Areas affected | Peru |
| Tsunami | Yes |
The November 1960 Peru earthquake occurred offshore northern Peru on November 20 at 17:02 local time. The magnitude of the earthquake was put at Ms 6.75 by using the conventional magnitude measurement within a shorter duration of ~20 s.[2][3] However, there is a large discrepancy between the magnitudes in Ms and Mw in this earthquake. The discrepancy was resulted from that the earthquake had a long source duration of about 130 s, and by calculating the seismic moment, the magnitude would be Mw 7.6 or Mw 7.8, according to different sources.[1][3] This earthquake belongs to a category of earthquakes with slow rupture velocities and potential of producing tsunamis larger than those expected from the moment magnitudes.[4]
This earthquake triggered a tsunami with a height of 9 meters (30 ft) in Puerto Eten, Lambayeque Department.[5] The tsunami caused damage along the coast of the Lambayeque department. Three deaths were reported in Lambayeque Department. Thirteen deaths and 50 missing were reported in Guañape Islands, La Libertad Department. The tsunami was also observed in Japan.[6]
References
- 1 2 3 4 5 Engdahl, E. R.; Vallaseñor, A. (2002). "Global seismicity: 1900–1999". International Handbook of Earthquake & Engineering Seismology (PDF). Part A, Volume 81A (First ed.). Academic Press. p. 681. ISBN 978-0124406520.
- ↑ http://www.es.ucsc.edu/~thorne/TL.pdfs/LB_megathrust_SEIZE.pdf
- 1 2 Pelayo, A. M.; Wiens, D. A. (1990). "The November 20,1960 Peru Tsunami Earthquake: Source mechanism of a slow event". Geophysical Research Letters. American Geophysical Union. 17 (6): 661–664. doi:10.1029/gl017i006p00661.
- ↑ http://www.tectonics.caltech.edu/publications/pdf/Sladen_JGR-2010.pdf
- ↑ http://www.municaletasantarosa.gob.pe/noticias/BOLETIN%20SEG%20EDI4.pdf
- ↑ National Geophysical Data Center / World Data Center (NGDC/WDC) Significant Earthquake Database, Boulder, CO, USA. (Available at http://www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=1&d=1)