1943 Ovalle earthquake explained

1943 Ovalle earthquake

Timestamp:

1943-04-06 16:07:17

Isc-Event:

899789

Anss-Url:

iscgem899789

Local-Time:

12:07^[1]

Magnitude:

7.9–8.2

Intensity:

^[2]

Depth:

35 km

Duration:

~25 seconds^[3] | countries affected = Chile, Coquimbo Region| location = ^[4] | aftershocks = | casualties = 11 dead| tsunami = yes}}

The Coquimbo Region of Chile was affected by a major earthquake on 6 April 1943 at 12:07 local time (16:07 UTC). It had a magnitude of between 7.9 and 8.2 on the moment magnitude scale.^[5] It triggered a minor tsunami that caused local damage along the coast. A total of 11 people were killed, including a group of five miners.

Tectonic setting

Central Chile lies above the destructive plate boundary where the Nazca Plate subducts beneath the South American Plate. There have been many large earthquakes caused by rupture along the plate interface. Illapel has been struck by major earthquakes in 1730, 1880, 1943 and 2015.^[6]

Damage

The earthquake caused major damage to Ovalle, Illapel, Salamanca and Combarbala. At the La Cocinera copper mine near Ovalle, a tailings dam collapsed, killing five miners.

References

Notes and References

1. Web site: Comments for the Significant Earthquake . . 13 June 2019.
2. José Fernández . César Pastén . Sergio Ruiz . Felipe Leyton . Damage assessment of the 2015 Mw 8.3 Illapel earthquake in the North‑Central Chile . Natural Hazards . 2018 . 96 . 269–283 . 10.1007/s11069-018-3541-3 . Springer. 134198142 .
3. Tilmann F. . Zhang Y. . Moreno M. . Saul J. . Eckelmann F. . Palo M. . Babeyko A. . Chen K. . Baez J.C. . Schurr B.; Wang R.; Dahm T. . 2015 . The 2015 Illapel earthquake, central Chile: A type case for a characteristic earthquake? . Geophysical Research Letters . 43 . 2 . 574–583 . 10.1002/2015GL066963. free .
4. 13 June 2019. cs1.
5. Beck S. . Barrientos S. . Kausel E. . Reyes M. . 1998 . Source characteristics of historic earthquakes along the central Chile subduction zone . Journal of South American Earth Sciences . 11 . 2 . 115–129 . 10.1016/S0895-9811(98)00005-4.
6. Ruiz S. . Madariaga R. . 2018 . Historical and recent large megathrust earthquakes in Chile . Tectonophysics . 733 . 37–56 . 10.1016/j.tecto.2018.01.015. 2018Tectp.733...37R .