UNOSAT Pijijiapan earthquake Mw 8.1, Mexico 08 September 2017 Population Exposure Analysis 08 September 2017 Geneva, Switzerland UNOSAT Contact: Postal Address: Email: [email protected] UNITAR – UNOSAT, IEH T: +41 22 767 4020 (UNOSAT Operations) Chemin des Anémones 11, 24/7 hotline: +41 76 487 4998 CH-1219, Genève, Suisse UNITAR-UNOSAT | Pijijiapan earthquake, Mexico. Mw 8.1– 08 September 2017| Population Exposure Analysis Overview An earthquake with 8.1 magnitude, at a depth of 70 km struck off the coast of Mexico on the 8th September 2017 at 2017-09-08 04:49:21 UTC time. According to USGS PAGER Report, the population in this region resides in structures that are a mix of vulnerable and earthquake resistant construction, the predominant vulnerable building types are adobe block with concrete bond beam and mud wall construction. Casualties and extensive damage are probable and the disaster is likely widespread.1 Population exposure estimates are based on i) Earthquake’s Moderate and Strong shaking zones deduced from USGS ground motion intensity data retrieved at 2017-09-08 10:00:00 UTC Time2 and ii) WorldPop gridded population estimates of the year 2015. Population Exposure in Mexico Total population of Population Exposed Population Exposed Population Exposed Mexico to Strong Shaking to Very Strong to Severe Shaking Shaking 125 million 1.93 million 1.3 million 200 thousand The table below shows population exposure estimation based on Earthquake’s related shaking areas deduced from USGS ground motion intensity data, at state level (Administrative Unit 1), desegregated data by administrative units 2 (Municipalities). Population Exposed to Total Population in States/Municipalities Affected Strong Very Strong Severe States/Municipalities Shaking Shaking Shaking Chiapas 1,524,402 1,100,656 198,241 2,823,299 Tonalá 50,452 48,437 98,889 Pijijiapan 10,470 43,414 53,883 Mapastepec 118 13,789 38,460 52,366 Acapetahua 6,132 26,851 32,983 Villa Comaltitlán 24,488 12,772 37,260 Huixtla 5,584 32,559 11,530 49,674 Mazatán 38,033 9,653 47,686 Arriaga 3,149 37,567 3,860 44,576 Huehuetán 30,067 2,202 32,270 1 https://earthquake.usgs.gov/realtime/product/losspager/us2000ahv0/us/1504853939320/onepager.pdf 2 https://earthquake.usgs.gov/earthquakes/eventpage/us2000ahv0#shakemap?source=us&code=us2000ahv0 UNITAR-UNOSAT | Pijijiapan earthquake, Mexico. Mw 8.1– 08 September 2017| Population Exposure Analysis Acacoyagua 9,727 725 10,452 Tuzantán 8,940 31,348 307 40,595 Escuintla 2,183 26,005 30 28,218 Tapachula 17,320 311,363 328,682 Villa Corzo 6,288 119,169 125,456 Villaflores 18,393 52,960 71,353 Cintalapa 33,803 41,813 75,615 Suchiate 19 38,720 38,739 Angel Albino Corzo 7,213 34,144 41,356 Jiquipilas 12,723 33,959 46,682 Tuxtla Chico 2,831 33,597 36,428 La Concordia 22,366 27,273 49,638 Cacahoatán 65,645 18,401 84,046 Frontera Hidalgo 15,772 15,772 Chicomuselo 20,173 14,473 34,646 Chiapa de Corzo 81,977 9,937 91,914 Metapa 6,541 6,541 Bella Vista 26,711 6,482 33,193 Ocozocoautla de Espinosa 81,207 5,872 87,079 Motozintla 83,234 4,233 87,467 Venustiano Carranza 69,565 3,664 73,229 Acala 23,486 3,134 26,620 Frontera Comalapa 36,825 2,880 39,705 Socoltenango 18,529 2,807 21,335 Siltepec 43,149 1,751 44,900 Suchiapa 27,270 724 27,994 Chiapilla 7,303 194 7,497 La Trinitaria 58,128 119 58,247 Tzimol 30,850 27 30,877 El Porvenir 17,480 11 17,491 Comitán de Domínguez 164,164 164,164 San Cristóbal de las Casas 83,313 83,313 Teopisca 44,717 44,717 Tuxtla Gutiérrez 42,738 42,738 Las Margaritas 40,565 40,565 Berriozábal 40,310 40,310 Amatenango de la Frontera 37,831 37,831 La Independencia 30,967 30,967 Las Rosas 26,406 26,406 Zinacantán 16,062 16,062 Ixtapa 15,866 15,866 San Lucas 15,657 15,657 Chamula 14,180 14,180 Totolapa 12,034 12,034 Bochil 10,569 10,569 Bejucal de Ocampo 9,469 9,469 Chanal 9,117 9,117 Altamirano 8,743 8,743 UNITAR-UNOSAT | Pijijiapan earthquake, Mexico. Mw 8.1– 08 September 2017| Population Exposure Analysis La Grandeza 8,373 8,373 Mazapa de Madero 8,236 8,236 San Fernando 8,117 8,117 Pichucalco 6,832 6,832 Huixtán 4,971 4,971 Tenejapa 4,773 4,773 Larráinzar 3,560 3,560 Amatenango del Valle 3,484 3,484 Pueblo Nuevo Solistahuacán 3,329 3,329 Nicolás Ruíz 2,898 2,898 Tecpatán 2,486 2,486 Ocosingo 2,177 2,177 Juárez 2,162 2,162 Coapilla 1,750 1,750 Mitontic 1,503 1,503 Oxchuc 1,460 1,460 Soyaló 792 792 Osumacinta 703 703 Ostuacán 576 576 Chicoasén 482 482 Copainalá 350 350 Jitotol 140 140 Chenalhó 65 65 Chilón 14 14 Oaxaca 354,445 192,694 585 547,723 Dist. Juchitan 180,873 159,924 585 341,382 Dist. Tehuantepec 173,557 32,770 206,326 Dist. Pochutla 15 15 Dist. Mixe 1 1 Tabasco 29,639 29,639 Huimanguillo 12,068 12,068 Tacotalpa 10,782 10,782 Teapa 6,298 6,298 Jalapa 492 492 Veracruz 23,857 23,857 Minatitlán 13,743 13,743 Hidalgotitlán 4,926 4,926 Las Choapas 4,129 4,129 Jesús Carranza 1,060 1,060 Total 1,932,344 1,293,350 198,826 3,424,519 Population exposure, summarized at State, municipalities’ level, has been calculated using 100 m resolution WorldPoP dataset. This is a preliminary analysis & has not yet been validated in the field. UNITAR-UNOSAT | Pijijiapan earthquake, Mexico. Mw 8.1– 08 September 2017| Population Exposure Analysis Map of the Areas Experienced Very Strong, Strong and Moderate Shaking 95°0'0"W 94°0'0"W 93°0'0"W 92°0'0"W 17°0'0"N 17°0'0"N 16°0'0"N 16°0'0"N 9 15°0'0"N 15°0'0"N 14°0'0"N 14°0'0"N 13°0'0"N 13°0'0"N Sources: Esri, DeLorme, USGS, NPS, Sources: Esri, USGS, NOAA Sources: Esri, DeLorme, USGS, NPS, Sources: Esri, USGS, NOAA 95°0'0"W 94°0'0"W 93°0'0"W 92°0'0"W .