1970 Colombia earthquake
UTC time | 1970-07-31 17:08:05 |
---|---|
ISC event | 794176 |
USGS-ANSS | ComCat |
Local date | July 31, 1970 |
Local time | 12:08:05 |
Magnitude | 8.0 Mw [1] |
Depth | 645 km (401 mi) [1] |
Epicenter | 1°36′S 72°32′W / 1.6°S 72.53°W [1] |
Areas affected | Colombia |
Max. intensity | MMI IV (Light) |
Casualties | 1 dead, several injured [2] |
The 1970 Colombia earthquake occurred in Colombia on July 31.
Details and aftermath
The shock killed one person and injured several others. Because it was a deep-focus earthquake, shaking occurred over an extensive area, including San Juan, Bogotá, Caracas, Buenos Aires, and São Paulo; it was felt as far north as Mexico City.[3] Its depth forestalled more serious casualties,[3] and there were no aftershocks.[4]
The depth of the earthquake prompted scientists in South America to install seismometer networks focused on
long-period earthquakes.[3] Until the 1994 Bolivia earthquake, the 1970 Colombia earthquake was famous among seismologists as the largest deep earthquake.[5]
Analysis
A study completed by
short-period shaking. Many studies have reached differing conclusions including a dearth of isotropic movement, and many scientists feel that resolution created errors in Dziewonski and Gilbert's findings.[7] In 1997, Russakoff, Ekstrom, and Tromp reassessed their findings utilizing more advanced equipment that factored in shear wave splitting and coupling (the measure of how tightly locked two sides of a fault or plate are) and confirmed that there was very little isotropic compression.[5]
See also
References
- ^ a b c ISC (2015), ISC-GEM Global Instrumental Earthquake Catalogue (1900–2009), Version 2.0, International Seismological Centre
- ^ IISEE. "IISEE Catalogue Search parameters page". Catalog of Damaging Earthquakes in the World. Retrieved August 18, 2013.
- ^ a b c "Historic Earthquakes: Colombia 1970". United States Geological Survey. November 1, 2012. Retrieved July 30, 2013.
- ISBN 978-0691095110.
- ^ a b c Russakoff, Ekstrom, and Tromp, pg. 20423.
- .
- ^ Russakoff, Ekstrom, and Tromp, pg. 20424.
Bibliography
- Russakoff, Daniel; Ekström, Göran & Tromp, Jeroen (September 10, 1997). "A new analysis of the great 1970 Colombia earthquake and its isotropic component". .
External links
- The International Seismological Centre has a bibliography and/or authoritative data for this event.