1973 Colima earthquake

Earthquake in Mexico 1973 Colima earthquake 18.489 -102.886 inline,title Mexico 1973-01-30 21:01:12 765442 https://earthquake.usgs.gov/earthquakes/eventpage/usp00000bf/executive 30 January 1973 15:01 CT 2 minutes 40 seconds 7.6 w yes 35.3 km Middle America Trench Thrust Mexico X Yes Yes 56 dead390 injured On January 30, 1973, at 15:01 (UTC–6), a magnitude 7.6 earthquake struck 35.3 km beneath the Sierra Madre del Sur range in the Mexican states of Colima, Jalisco and Michoacán.ISC-GEM Global Instrumental Earthquake Catalogue (1900–2009) https://www.isc.ac.uk/iscgem/index.php ISC 27 June 2022 International Seismological Centre Version 9.1 On the Mercalli intensity scale, the earthquake reached a maximum intensity of X (Extreme),Michoacán, Mexico 1973 usp00000bf M 7.5 – 35 km SW of Aguililla, Mexico 5 January 2023 cs2 causing serious damage in the region. At least 56 people were killed and about 390 were injured.Significant Earthquake Database National Geophysical Data Center / World Data Service (NGDC/WDS) 1972 National Geophysical Data Center, NOAA 10.7289/V5TD9V7K Data Set The event is commonly referred to as the Colima earthquake. Tectonic setting Off the west coast of Mexico is the Middle America Trench; a convergent plate boundary where the Cocos and Rivera plates subducts beneath the North American plate at a rate of ~6–9 cm/yr.2018 Do slow slip events trigger large and great megathrust earthquakes? Science Advances 4 10 10.1126/sciadv.aat8472 free Voss N. Dixon T. H. Liu Z. Malservisi R. Protti M. Schwartz S. Susan Schwartz eaat8472 30402540 6209384 2018SciA....4.8472V The interface of this plate boundary is a huge thrust fault known as a megathrust which occasionally produces large megathrust earthquakes and tsunamis. Earthquake The January 30 earthquake ruptured a shallow-angle section of the megathrust near a triple junction with the Rivera plate. Its location places it very close to the rupture patch of the 1941 earthquake. The depth of the event varies between seismological agencies and studies, from as shallow as 8 km to 43 km. It is estimated that a 145 km by 85 km section of the subduction zone was involved in the rupture which propagated at a velocity of 2.7 km/s.Miguel A. Santoyo Takeshi Mikumo Luis Quintanar 2006 Faulting process and coseismic stress change during the 30 January, 1973, Colima, Mexico interplate earthquake (Mw=7.6) https://www.academia.edu/24776825 Geophysics International (In Spanish) 45 3 163–178 10.22201/igeof.00167169p.2006.45.3.203 2006GeofI..45..163S freeStuart V. Schmitt Charles DeMets J. Stock O. Sánchez B. Márquez-Azúa G. Reyes 2007 A geodetic study of the 2003 January 22 Tecomán, Colima, Mexico earthquake Geophysical Journal International 169 2 389–406 10.1111/j.1365-246X.2006.03322.x 2007GeoJI.169..389S freeSantoyo Miguel A. Mikumo Takeshi Menzoza Carlos 2007 Possible lateral stress interactions in a sequence large interplate thrust earthquakes on the subducting Cocos and Rivera plates https://repository.kulib.kyoto-u.ac.jp/dspace/handle/2433/193420 Geofísica Internacional 46 4 211–226 10.22201/igeof.00167169p.2007.46.4.50 2007GeofI..46..211S 2433/193420 free The rupture occurred on the subduction interface at between 5 km and 27 km depth. Prior to the earthquake, that section of the subduction zone was designated a seismic gap which has not experience any earthquakes in recent memory.Shri Krishna Singh Luciana Astiz 1981 Seismic gaps and recurrence periods of large earthquakes along the Mexican subduction zone: A reexamination Bulletin of the Seismological Society of America 71 3 827 10.1785/BSSA0710030827 1981BuSSA..71..827S The 1985 Mexico City earthquake rupture would overlap that of the 1973 quake 12 years later.S. K. Singh J. F. Pacheco L. Alcántara G. Reyes M. Ordaz A. Iglesias S. M. Alcocer C. Gutierrez C. Valdés V. Kostoglodov C. Reyes T. Mikumo R. Quaas J. G. Anderson 2003 A Preliminary Report on the Tecoma'n, Mexico Earthquake of 22 January 2003 (Mw 7. 4) and Its Effects https://usuarios.geofisica.unam.mx/vladimir/papers_pdf/Singh_etal_SRL_2003.pdf Seismological Research Letters 74 3 279–289 10.1785/gssrl.74.3.279 2003SeiRL..74..279S Around 330 aftershocks were recorded over a two-and-a-half week period following the deployment of seismographs four days after the mainshock. The largest aftershock measured magnitude 6.2. Most of the aftershocks measured 1.5–4.5 on the local magnitude scale with focal depths of 2–30 km.Reyes A. Brune J. N. Lomnitz C. Source mechanism and aftershock study of the Colima, Mexico earthquake of January 30, 1973 Bulletin of the Seismological Society of America 1979 69 6 1819–1840 10.1785/BSSA0690061819 1979BuSSA..69.1819R Tsunami A moderate tsunami with amplitudes of 0.40–1.16 m was observed along the Mexican coast.Tsunami Event Information S. MEXICO https://www.ngdc.noaa.gov/hazel/view/hazards/tsunami/event-more-info/2058 1 January 2021 NGDCCoffman Jerry L. 1975 United States Earthquakes, 1973 https://books.google.com/books?id=GM3tCGzvEAwC&q=1973+tecoman+earthquake&pg=PA68 United States Geological Survey Tidal gauges in Hawaii also recorded the tsunami at 0.21 m. Impact The earthquake was powerful enough to be felt across the country to the Gulf of Mexico. Severe shaking and heavy damage were limited to the states of Colima, Jalisco and Michoacán. Fifty six people died and 390 were injured by this event. Tecomán and Coahuayana suffered significant damage from the violent ground motions. Landslides and ground fissures were discovered along the relatively unpopulated coasts of Michoacán. Water, electricity and telephone lines were cut throughout. An elementary school in Manzanillo, Colima sustained significant structural damage after the quake. The school building rocked so violently that many eyewitnesses thought the structure would collapse. Damage was so severe that the building was determined unsafe for use and demolished. In another part of the city, an obelisk partially collapsed, with only three quarters of the structure remaining.Victor Manuel Martinez It will be 48 years since the 1973 earthquake in Manzanillo and Colima El Noticiero en Línea https://elnoticieroenlinea.com/se-cumpliran-48-anos-del-terremoto-de-1973-en-manzanillo-y-colima/ 4 June 2021 29 December 2020 A highway which connected Manzanillo with Salagua and Santiago in Colima suffered major damage including large fissures which opened in the asphalt. In Mexico City, the earthquake was felt strongly in the north and western part of the city for at least 40 seconds. It caused mass hysteria and light damage to high-rise buildings.10 reported in a quake in Mexico The New York Times https://www.nytimes.com/1973/01/31/archives/10-reported-killed-in-a-quake-in-mexico.html 1 January 2021 31 January 1973 See also List of earthquakes in Mexico List of earthquakes in 1973 References Category:1973 earthquakes Category:Earthquakes in Mexico Category:1973 in Mexico Category:1973 disasters in Mexico Category:1970s tsunamis Category:Natural history of Colima