Largest Colombian crustal earthquake in 20 years strikes on Christmas Eve

Temblor ◽  
2020 ◽  
Author(s):  
Albert Leonardo Aguilar Suarez ◽  
Ross Stein ◽  
Keyword(s):  
Crustal Earthquake

scholarly journals Analysis the 1978–2008 crustal and sub-crustal earthquake catalog of Vrancea region

2012 ◽  
Vol 12 (5) ◽  
pp. 1321-1325 ◽  
Author(s):  
L. Telesca ◽  
V. Alcaz ◽  
I. Sandu
Keyword(s):  
Seismic Hazard ◽  
Hazard Assessment ◽  
Seismic Hazard Assessment ◽  
Earthquake Catalog ◽  
B Values ◽  
Crustal Earthquake ◽  
Quarry Blast ◽  
Vrancea Region ◽  
Completeness Magnitude

Abstract. The crustal and sub-crustal seismicity that occurred in the Vrancea area from 1978 to 2008 is investigated. Due to quarry blast contamination, the analysis of the crustal seismicity was restricted to events that occurred between 20 km and 60 km, considering sub-crustal events as all those that occurred at depths larger than 60 km. The completeness magnitude was estimated between 2.3 and 2.5 for the crustal seismicity and between 2.9 and 3.1 for the sub-crustal one. The Gutenberg-Richter b-values show clear differences between crustal and sub-crustal seismicity, with values around 0.9 and 1.3–1.4, respectively. The analysis performed in this study represents a preliminary issue for the seismic hazard assessment of surrounding regions like Moldova, for which the earthquakes generated in Vrancea represent an important threat.

Characterizing Crustal Earthquake Slip Models for the Prediction of Strong Ground Motion

1999 ◽  
Vol 70 (1) ◽  
pp. 59-80 ◽  
Author(s):  
P. Somerville ◽  
K. Irikura ◽  
R. Graves ◽  
S. Sawada ◽  
D. Wald ◽  
...  
Keyword(s):  
Ground Motion ◽  
Strong Ground Motion ◽  
Crustal Earthquake ◽  
Strong Ground

Source parameters of the Mw=6.3 Aroma crustal earthquake of July 24, 2001 (northern Chile), and its aftershock sequence

2007 ◽  
Vol 24 (1) ◽  
pp. 58-68 ◽  
Author(s):  
D. Legrand ◽  
B. Delouis ◽  
L. Dorbath ◽  
C. David ◽  
J. Campos ◽  
...  
Keyword(s):  
Source Parameters ◽  
Aftershock Sequence ◽  
Northern Chile ◽  
Crustal Earthquake

110th Anniversary of the Mexican National Seismological Service: An Account of Its Early Contributions

2020 ◽  
Vol 91 (5) ◽  
pp. 2904-2911
Author(s):  
Gerardo Suárez ◽  
Xyoli Pérez-Campos
Keyword(s):  
International Association ◽  
Volcanic Belt ◽  
Early Years ◽  
Macroseismic Data ◽  
Political Struggle ◽  
Crustal Earthquake ◽  
Mexican Volcanic Belt ◽  
Populated Region ◽  
The City ◽  
Central Station

Abstract The Mexican National Seismological Service (SSN) was founded on 5 September 1910, in response to commitments made by Mexico to the International Association of Seismology in 1903. The first seismic instruments installed in 1904 were a Bosch–Omori seismograph and a Palmieri seismoscope. The SSN was formally inaugurated on 5 September 1910, a few days before the revolution broke out; a political struggle that lasted over two decades. The SSN was inaugurated with a central station in Tacubaya, Mexico City, and two secondary stations. Wiechert seismographs were selected by the SSN for its budding network. Despite the adverse economic and political situation, the SSN managed to grow and install more stations during the turmoil. Besides the installation of new seismic stations and reporting the location and macroseismic data of earthquakes in Mexico, the SSN staff produced remarkable reports of important earthquakes that occurred in those early years. Notable among these are the detailed reports on the 19 November 1912 and 4 January 1920 earthquakes on the Trans-Mexican volcanic belt. These reports have shaped the estimations of seismic hazard in this highly populated region of Mexico. In the first aftershock studies reported, the SSN took Wiechert instruments to the epicentral areas of a large subduction earthquake in 1907 and to the city of Xalapa, in the vicinity of the 1920 crustal earthquake. With foresight in those early years of seismology, the SSN scientists correctly attributed the 1912 earthquake to a local active fault. The seismograms collected in 1920 confirmed that it was a crustal earthquake and not an in-slab event. Lack of funding and official interest did not permit the modernization of the SSN for many decades. National interest in the Service was boosted by the 19 September 1985 destructive earthquake.

The 10 April 2014 Nicaraguan Crustal Earthquake: Evidence of Complex Deformation of the Central American Volcanic Arc

2015 ◽  
Vol 173 (10-11) ◽  
pp. 3305-3315 ◽  
Author(s):  
Gerardo Suárez ◽  
Angélica Muñoz ◽  
Isaac A. Farraz ◽  
Emilio Talavera ◽  
Virginia Tenorio ◽  
...  
Keyword(s):  
Central American ◽  
Complex Deformation ◽  
Volcanic Arc ◽  
Crustal Earthquake ◽  
Central American Volcanic Arc
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