Mostrar mensagens com a etiqueta Loma Prieta. Mostrar todas as mensagens
Mostrar mensagens com a etiqueta Loma Prieta. Mostrar todas as mensagens

terça-feira, outubro 17, 2023

O sismo de Loma Prieta foi há trinta e quatro anos...

  

O Sismo de Loma Prieta de 1989 ocorreu na região da área da baía de São Francisco, na Califórnia, Estados Unidos, no dia 17 de outubro de 1989, às 17.04, hora local (00.04 UTC no dia 18), e teve magnitude de 6,9 na escala de magnitude de momento (Mw). O epicentro foi a 16 km a nordeste de Santa Cruz, numa secção na Falha de Santo André na montanha de Loma Prieta (que deu o nome ao sismo), localizada ao longo das Montanhas de Santa Cruz. Teve duração de 8 a 15 segundos e o hipocentro foi a uma profundidade de 19 km. Causou a morte de 63 pessoas e outras 3.757 ficaram feridas. O prejuízo total foi de cerca de 5,6 a 6 mil milhões de dólares.
O terramoto ficou mais conhecido por ser o primeiro sismo da era moderna com epicentro nos Estados Unidos a ser transmitido ao vivo, em rede nacional, por uma emissora de televisão no país, a American Broadcasting Company (ABC), devido ao jogo n.º 3 da World Series da Major League Baseball de 1989 que estava para ser iniciado no Candlestick Park, e por coincidência, tinha como finalistas as duas equipas da área da baía de São Francisco (região atingida pelo tremor de terra), os San Francisco Giants e os Oakland Athletics
 
  
 

segunda-feira, outubro 17, 2022

O sismo de Loma Prieta foi há trinta e três anos...

  

O Sismo de Loma Prieta de 1989 ocorreu na região da área da baía de São Francisco, na Califórnia, Estados Unidos, no dia 17 de outubro de 1989, às 17.04, hora local (00.04 UTC no dia 18), e teve magnitude de 6,9 na escala de magnitude de momento (Mw). O epicentro foi a 16 km a nordeste de Santa Cruz, numa secção na Falha de Santo André na montanha de Loma Prieta (que deu o nome ao sismo), localizada ao longo das Montanhas de Santa Cruz. Teve duração de 8 a 15 segundos e o hipocentro foi a uma profundidade de 19 km. Causou a morte de 63 pessoas e outras 3.757 ficaram feridas. O prejuízo total foi de cerca de 5,6 a 6 mil milhões de dólares.
O terramoto ficou mais conhecido por ser o primeiro sismo da era moderna com epicentro nos Estados Unidos a ser transmitido ao vivo, em rede nacional, por uma emissora de televisão no país, a American Broadcasting Company (ABC), devido ao jogo n.º 3 da World Series da Major League Baseball de 1989 que estava para ser iniciado no Candlestick Park, e por coincidência, tinha como finalistas as duas equipas da área da baía de São Francisco (região atingida pelo tremor de terra), os San Francisco Giants e os Oakland Athletics
 
  

domingo, outubro 17, 2021

O sismo de Loma Prieta foi há 32 anos...

  

O Sismo de Loma Prieta de 1989 ocorreu na região da área da baía de São Francisco, na Califórnia, Estados Unidos, no dia 17 de outubro de 1989, às 17.04, hora local (00.04 UTC no dia 18), e teve magnitude de 6,9 na escala de magnitude de momento (Mw). O epicentro foi a 16 km a nordeste de Santa Cruz, numa secção na Falha de Santo André na montanha de Loma Prieta (que deu o nome ao sismo), localizada ao longo das Montanhas de Santa Cruz. Teve duração de 8 a 15 segundos e o hipocentro foi a uma profundidade de 19 km. Causou a morte de 63 pessoas e outras 3.757 ficaram feridas. O prejuízo total foi de cerca de 5,6 a 6 mil milhões de dólares.
O terramoto ficou mais conhecido por ser o primeiro sismo da era moderna com epicentro nos Estados Unidos a ser transmitido ao vivo, em rede nacional, por uma emissora de televisão no país, a American Broadcasting Company (ABC), devido ao jogo n.º 3 da World Series da Major League Baseball de 1989 que estava para ser iniciado no Candlestick Park, e por coincidência, tinha como finalistas as duas equipas da área da baía de São Francisco (região atingida pelo tremor de terra), os San Francisco Giants e os Oakland Athletics
 
  

sábado, outubro 17, 2020

O sismo de Loma Prieta foi há 31 anos

  

O Sismo de Loma Prieta de 1989 ocorreu na região da área da baía de São Francisco, na Califórnia, Estados Unidos, no dia 17 de outubro de 1989, às 17.04, hora local (00.04 UTC no dia 18), e teve magnitude de 6,9 na escala de magnitude de momento (Mw). O epicentro foi a 16 km a nordeste de Santa Cruz, numa secção na Falha de Santo André na montanha de Loma Prieta (que deu o nome ao sismo), localizada ao longo das Montanhas de Santa Cruz. Teve duração de 8 a 15 segundos e o hipocentro foi a uma profundidade de 19 km. Causou a morte de 63 pessoas e outras 3.757 ficaram feridas. O prejuízo total foi de cerca de 5.6 a 6 mil milhões de dólares.
O terramoto ficou mais conhecido por ser o primeiro sismo da era moderna com epicentro nos Estados Unidos a ser transmitido ao vivo, em rede nacional, por uma emissora de televisão no país, a American Broadcasting Company (ABC), devido ao jogo n.º 3 da World Series da Major League Baseball de 1989 que estava para ser iniciado no Candlestick Park, e por coincidência, tinha como finalistas as duas equipas da área da baía de São Francisco (região atingida pelo tremor de terra), os San Francisco Giants e os Oakland Athletics.
  

quinta-feira, outubro 17, 2019

O sismo de Loma Prieta foi há trinta anos





Date October 17, 1989
Origin time 5:04:15 PDT
Duration 8 – 15 seconds
Magnitude 6.9 Mw
Depth 19 km (12 mi)
Epicenter 37.04°N 121.88°W
Type Oblique slip
Areas affected Central Coast (California)
San Francisco Bay Area
United States
Total damage $5.6 – 6 billion
Max. intensity IX (Violent)
Peak acceleration .65g (at epicenter)
Tsunami Yes
Landslides 1,000 – 4,000
Foreshocks 5.3 ML June 27, 1988
5.4 ML August 8, 1989
Casualties 63 killed, 3,757 injured

The 1989 Loma Prieta earthquake occurred in northern California on October 17 at 5:04 p.m. local time. The shock was centered in a sparsely populated area approximately 10 mi (16 km) northeast of Santa Cruz on a section of the San Andreas Fault System and was named for the nearby Loma Prieta peak in the Santa Cruz Mountains. With a maximum Mercalli intensity of IX (Violent), and a moment magnitude of 6.9, the shock was responsible for 63 deaths and 3,757 injuries in the affected areas. Damage was heavy in Santa Cruz County and less so to the south in Monterey County, but effects extended well to the north (and further from the epicenter) into the San Francisco Bay Area, both on the San Francisco Peninsula and across the bay in Oakland.
The Loma Prieta (or southern Santa Cruz Mountains) segment of the San Andreas Fault System had been undergoing a long period of quiescence until several moderate foreshocks occurred in June 1988 and again in August 1989. The foreshocks were of significance because that segment of the San Andreas Fault System had been so quiet that it had been labeled a seismic gap. No large earthquake had occurred in that region since the 1906 San Francisco earthquake. No surface faulting occurred, though a large number of other ground failures and landslides occurred, especially in the Summit area of the Santa Cruz Mountains. Liquefaction was also a significant issue, especially in the heavily damaged Marina District of San Francisco, but its effects were also seen in the East Bay, and near the shore of Monterey Bay, where a non-destructive tsunami was also observed. Abundant strong motion records were captured due to a large number of seismometers that were operating in the region.
Due to the sports coverage of the 1989 World Series, it became the first major earthquake in the United States that was broadcast live on national television. Rush-hour traffic on the Bay Area freeways was lighter than normal due to nearly 62,000 people present at the game at Candlestick Park in San Francisco, and this may have prevented a larger loss of life, as several of the Bay Area's major transportation structures suffered catastrophic failures. A section of the double-deck Nimitz Freeway that collapsed in Oakland was the site of the single largest number of casualties for the event, but the collapse of man-made structures and other related accidents contributed to casualties occurring in San Francisco, Los Altos, and Santa Cruz.
 

sábado, outubro 17, 2015

Há 26 anos um sismo devastou a região de São Francisco

O Sismo de Loma Prieta de 1989 ocorreu na região da área da baía de São Francisco, na Califórnia, Estados Unidos, no dia 17 de outubro de 1989, às 17.04, hora local (00.04 UTC no dia 18), e teve magnitude de 6,9 na escala de magnitude de momento (Mw). O epicentro foi a 16 km a nordeste de Santa Cruz, numa secção na Falha de Santo André na montanha de Loma Prieta (que deu o nome ao sismo), localizada ao longo das Montanhas de Santa Cruz. Teve duração de 8 a 15 segundos e o hipocentro foi a uma profundidade de 19 km. Causou a morte de 63 pessoas e outras 3.757 ficaram feridas. O prejuízo total foi de cerca de 5.6 a 6 mil milhões de dólares.
O terramoto ficou mais conhecido por ser o primeiro sismo da era moderna com epicentro nos Estados Unidos a ser transmitido ao vivo, em rede nacional, por uma emissora de televisão no país, a American Broadcasting Company (ABC), devido ao jogo n.º 3 da World Series da Major League Baseball de 1989 que estava para ser iniciado no Candlestick Park, e por coincidência, tinha como finalistas as duas equipas da área da baía de São Francisco (região atingida pelo tremor de terra), os San Francisco Giants e os Oakland Athletics.

sexta-feira, outubro 17, 2014

Há 25 anos, o sismo de Loma Prieta mostrou à Califórnia que não se brinca com risco sísmico

1989 Loma Prieta earthquake
Image of collapsed double-decker freeway structure in Oakland, California
1989 Loma Prieta earthquake is located in California
Santa Cruz
Santa Cruz
Oakland
Oakland
Salinas
Salinas
1989 Loma Prieta earthquake
Date October 17, 1989
Origin time 5:04:15 PDT
Duration 8 – 15 seconds
Magnitude 6.9 Mw
Depth 19 km (12 mi)
Epicenter 37.04°N 121.88°WCoordinates: 37.04°N 121.88°W
Type Oblique slip
Areas affected Central Coast (California)
San Francisco Bay Area
United States
Total damage $5.6 – 6 billion
Max. intensity IX (Violent)
Peak acceleration .65g (at epicenter)
Tsunami Yes
Landslides 1,000 – 4,000
Foreshocks 5.3 ML June 27, 1988
5.4 ML August 8, 1989
Casualties 63 killed, 3,757 injured


The 1989 Loma Prieta earthquake occurred in northern California on October 17 at 5:04 p.m. local time. The shock was centered in a sparsely populated area approximately 10 mi (16 km) northeast of Santa Cruz on a section of the San Andreas Fault System and was named for the nearby Loma Prieta peak in the Santa Cruz Mountains. With a maximum Mercalli intensity of IX (Violent), and a moment magnitude of 6.9, the shock was responsible for 63 deaths and 3,757 injuries in the affected areas. Damage was heavy in Santa Cruz County and less so to the south in Monterey County, but effects extended well to the north (and further from the epicenter) into the San Francisco Bay Area, both on the San Francisco Peninsula and across the bay in Oakland.
The Loma Prieta (or southern Santa Cruz Mountains) segment of the San Andreas Fault System had been undergoing a long period of quiescence until several moderate foreshocks occurred in June 1988 and again in August 1989. The foreshocks were of significance because that segment of the San Andreas Fault System had been so quiet that it had been labeled a seismic gap. No large earthquake had occurred in that region since the 1906 San Francisco earthquake. No surface faulting occurred, though a large number of other ground failures and landslides occurred, especially in the Summit area of the Santa Cruz Mountains. Liquefaction was also a significant issue, especially in the heavily damaged Marina District of San Francisco, but its effects were also seen in the East Bay, and near the shore of Monterey Bay, where a non-destructive tsunami was also observed. Abundant strong motion records were captured due to a large number of seismometers that were operating in the region.
Due to the sports coverage of the 1989 World Series, it became the first major earthquake in the United States that was broadcast live on national television. Rush-hour traffic on the Bay Area freeways was lighter than normal due to nearly 62,000 people present at the game at Candlestick Park in San Francisco, and this may have prevented a larger loss of life, as several of the Bay Area's major transportation structures suffered catastrophic failures. A section of the double-deck Nimitz Freeway that collapsed in Oakland was the site of the single largest number of casualties for the event, but the collapse of man-made structures and other related accidents contributed to casualties occurring in San Francisco, Los Altos, and Santa Cruz.

quarta-feira, outubro 17, 2012

Há 23 anos, o sismo de Loma Prieta afetou a cidade de S. Francisco

The Loma Prieta earthquake, also known as the Quake of '89 and the World Series Earthquake was a major earthquake that struck the San Francisco Bay Area of California on October 17, 1989, at 5:04 pm local time. Caused by a slip along the San Andreas Fault, the quake lasted 10–15 seconds and measured 6.9 both on the moment magnitude scale (surface-wave magnitude 7.1) and on the open-ended Richter Scale. The quake killed 63 people throughout northern California, injured 3,757 and left some 3,000–12,000 people homeless.
The earthquake occurred during the warm-up practice for the third game of the 1989 World Series, featuring both of the Bay Area's Major League Baseball teams, the Oakland Athletics and the San Francisco Giants. Because of game-related sports coverage, this was the first major earthquake in the United States of America to have its initial jolt broadcast live on television.
Epicenter
The epicenter of the quake was in the Forest of Nisene Marks State Park in Santa Cruz County, an unpopulated area in the Santa Cruz Mountains (geographical coordinates 37.040°N 121.877°W), approximately 2–3 miles (3–5 km) north of unincorporated Aptos and approximately 10 mi (16 km) northeast of Santa Cruz. The quake was named for the nearby Loma Prieta Peak which lies 5 mi (8 km) to the northeast in Santa Clara County.

Injuries and fatalities
Fifty-seven of the deaths were directly caused by the earthquake; six further fatalities were ruled to have been caused indirectly. In addition, there were 3,757 injuries as a result of the earthquake - 400 severely hurt. The highest number of fatalities, 42, occurred in Oakland because of the Cypress Street Viaduct collapse on the Nimitz Freeway (Interstate 880), where the upper level of a double-deck portion of the freeway collapsed, crushing the cars on the lower deck. One 50-foot (15 m) section of the San Francisco – Oakland Bay Bridge also collapsed, leading to a single fatality on the bridge. Three people were killed in the collapse of the Pacific Garden Mall in Santa Cruz, and five people were killed in the collapse of a brick wall on Bluxome Street in San Francisco.
When the earthquake hit, the third game of the 1989 World Series baseball championship was just beginning. Because of the unusual circumstance that both of the World Series teams (the San Francisco Giants and Oakland Athletics) were based in the affected area, many people had left work early or were staying late to participate in after work group viewings and parties. As a consequence, the usually crowded freeways contained exceptionally light traffic. If traffic had been normal for a Tuesday rush hour, injuries and deaths could have been higher. The initial media reports failed to take into account the game's effect on traffic and initially estimated the death toll at 300, a number that was corrected to 63 in the days after the earthquake.

Damage
The earthquake caused severe damage in some very specific locations in the San Francisco Bay Area, most notably on unstable soil in San Francisco and Oakland. Oakland City Hall was evacuated after the earthquake until US$80M seismic retrofit and hazard abatement work was complete in 1995. Many other communities sustained severe damage throughout the region located in Alameda, San Mateo, Santa Clara, San Benito, Santa Cruz, and Monterey counties. Major property damage in San Francisco's Marina District 60 mi (97 km) from the epicenter resulted from liquefaction of soil used to create waterfront land. Other effects included sand volcanoes, landslides, and ground ruptures. Some 12,000 homes and 2,600 businesses were damaged. In Santa Cruz, close to the epicenter, 40 buildings collapsed, killing six people. At the Santa Cruz Beach Boardwalk, the Plunge building was significantly damaged. Liquefaction also caused damage in the Watsonville area. For example, sand volcanoes formed in a field near Pajaro as well as in a strawberry field. The Ford's department store in Watsonville experienced significant damage, including a crack down the front of the building. Many homes were dislodged if they were not bolted to their foundations. There were structural failures of twin bridges across Struve Slough near Watsonville. In Moss Landing, the liquefaction destroyed the causeway that carried the Moss Beach access road across tidewater basin, damaged the approach and abutment of the bridge linking Moss Landing spit to the mainland and cracked the paved road on Paul's Island. In the Old Town historical district of the city of Salinas, unreinforced masonry buildings were partially destroyed.
The quake caused an estimated $6 billion in property damage, becoming one of the most expensive natural disasters in U.S. history at the time. It was the largest earthquake to occur on the San Andreas Fault since the great 1906 San Francisco earthquake. Private donations poured in to aid relief efforts and on October 26, President George H. W. Bush signed a $3.45 billion earthquake relief package for California.

Collapse of the Cypress Street Viaduct

segunda-feira, outubro 17, 2011

O sismo de Loma Prieta foi há 22 anos

The Loma Prieta earthquake, also known as the Quake of '89 and the World Series Earthquake, was a major earthquake that struck the San Francisco Bay Area of California on October 17, 1989, at 5:04 p.m. local time. Caused by a slip along the San Andreas Fault, the quake lasted 10–15 seconds and measured 6.9 on the moment magnitude scale (surface-wave magnitude 7.1) or 6.9 on the open-ended Richter Scale. The quake killed 63 people throughout northern California, injured 3,757 and left some 3,000-12,000 people homeless.
The earthquake occurred during the warm-up practice for the third game of the 1989 World Series, featuring both of the Bay Area's Major League Baseball teams, the Oakland Athletics and the San Francisco Giants. Because of game-related sports coverage, this was the first major earthquake in the United States of America to have its initial jolt broadcast live on television.