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Guerrero, Oaxaca, Mexico City: 8.6 M w: Severe / tsunami: 1776-04-21: Mexico City, Southern: VIII: Stover & Coffman 1993 uses various seismic scales. M La is a local magnitude that is equivalent to M L (Richter scale) and is used for events that occurred prior to the instrumental period.
The National Seismological Service (Spanish: Servicio Sismológico Nacional, SSN) is a seismological organization in Mexico that studies and records earthquake activity within the country. It is part of the Geophysics Institute at the National Autonomous University of Mexico (UNAM) and is based in Mexico City.
Basic horizontal-motion seismograph. The inertia of the round weight tends to hold the pen still while the base moves back and forth. A simple seismometer, sensitive to up-down motions of the Earth, is like a weight hanging from a spring, both suspended from a frame that moves along with any motion detected.
A presidential decree founded El Observatorio Meteorológico y Astrónomico de México (The Meteorological and Astronomical Observatory of Mexico) on February 6, 1877 as part of the Geographic Exploring of the National Territory commission. By 1880, it became an independent agency located at Chapultepec Castle, then encompassing six observatories.
The National Institute of Statistics and Geography (INEGI from its former name in Spanish: Instituto Nacional de Estadística, Geografía e Informática) is an autonomous agency of the Mexican Government dedicated to coordinate the National System of Statistical and Geographical Information of the country. [1]
The Mexican Secretariat of National Defense (SEDENA); Spanish: Secretaría de la Defensa Nacional is the government department responsible for managing Mexico's Army and Air Forces. Its head is the Secretary of National Defense who, like the co-equal Secretary of the Navy , is directly answerable to the President. [ 2 ]
The National Library of Mexico (Spanish: Biblioteca Nacional de México) is located in Ciudad Universitaria, the main campus of the National Autonomous University of Mexico (UNAM) in Mexico City. It was first established on November 30, 1867. [3] As a national library it is the preeminent bibliographic repository of Mexico and is subject to ...
La Hora Nacional emerged during a decade when the Mexican government under Lázaro Cárdenas further entered the medium of broadcasting. Programming on La Hora Nacional has varied widely throughout its history, including classical music, popular music and live remotes from various locations in Mexico; it has also tended to change significantly ...