Vertical ground motions of the San Salvador metropolitan area (AMSS) seen at the ALOS InSAR data

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F17%3A00000191" target="_blank" >RIV/00025798:_____/17:00000191 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Vertical ground motions of the San Salvador metropolitan area (AMSS) seen at the ALOS InSAR data

Popis výsledku v původním jazyce

The city has suffered from many severe earthquakes, the most disastrous of which occurred in 1854. The San Salvador volcano erupted again in 1917,resulting in three major earthquakes that damaged the city so extensively the government was forced to temporarily move the capital to the city of Santa Tecla (known at the time as Nueva San Salvador). The 1986 San Salvador Earthquake struck on October 10, 1986, causing considerable damage to the city and surrounding areas. Between 1,000 and 1,500 people are believed to have been killed, and over 10,000 people were injured. 200,000 people were left homeless after the earthquake and a week of minor aftershocks. The 2001 El Salvador earthquakes struck El Salvador on January 13 and February 13, 2001, resulting in considerable damage to the city, especially in Las Colinas suburb, where a landslide destroyed homes and killed many people. The interferometric analysis of San Salvador has included 20 ALOS scenes – L band, collected between 31 December 2006 and 26 February 2011 (Fig. 1). It has revealed presence of vertical ground deformation. Persistent Scatterer Interferometry (PSInSAR) confirmed subsidence about 97% of San Salvador Metropolitan Area (AMSS). Subsidence is observed mainly within Quaternary silicic volcanic rock, mostly tuffs. The biggest subsidence is situated in the eastern part of AMSS, close to the Lake Ilopango, with values exceeding 10 mm/yr. Small uplift was confirmed within young Quaternary and mafic volcanic rocks, on the north slope of the San Salvador volcano. The another interesting phenomenon could be observed in northern – central part of the city (Department Mejicanos). This area could be characterized generally as stable with small predominance of the uplift up to 5 mm/yr. Due to the high seismicity of Salvador satellite interferometric monitoring should be continued.

Název v anglickém jazyce

Vertical ground motions of the San Salvador metropolitan area (AMSS) seen at the ALOS InSAR data

Popis výsledku anglicky

The city has suffered from many severe earthquakes, the most disastrous of which occurred in 1854. The San Salvador volcano erupted again in 1917,resulting in three major earthquakes that damaged the city so extensively the government was forced to temporarily move the capital to the city of Santa Tecla (known at the time as Nueva San Salvador). The 1986 San Salvador Earthquake struck on October 10, 1986, causing considerable damage to the city and surrounding areas. Between 1,000 and 1,500 people are believed to have been killed, and over 10,000 people were injured. 200,000 people were left homeless after the earthquake and a week of minor aftershocks. The 2001 El Salvador earthquakes struck El Salvador on January 13 and February 13, 2001, resulting in considerable damage to the city, especially in Las Colinas suburb, where a landslide destroyed homes and killed many people. The interferometric analysis of San Salvador has included 20 ALOS scenes – L band, collected between 31 December 2006 and 26 February 2011 (Fig. 1). It has revealed presence of vertical ground deformation. Persistent Scatterer Interferometry (PSInSAR) confirmed subsidence about 97% of San Salvador Metropolitan Area (AMSS). Subsidence is observed mainly within Quaternary silicic volcanic rock, mostly tuffs. The biggest subsidence is situated in the eastern part of AMSS, close to the Lake Ilopango, with values exceeding 10 mm/yr. Small uplift was confirmed within young Quaternary and mafic volcanic rocks, on the north slope of the San Salvador volcano. The another interesting phenomenon could be observed in northern – central part of the city (Department Mejicanos). This area could be characterized generally as stable with small predominance of the uplift up to 5 mm/yr. Due to the high seismicity of Salvador satellite interferometric monitoring should be continued.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10505 - Geology

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů