The earthquake hit at 3:11 PM approximately 100 miles (160 km) off the coast of Chile, parallel to the city of Valdivia. The shock is generally agreed to have had a magnitude of 9.5, though some studies alternately proposed that it may have been 9.4 or 9.6. A series of foreshocks the previous day had warned of the incipient disaster; one, of magnitude 8.1, caused major destruction in Concepción. The fault-displacement source of the earthquake extended over an estimated 560–620 mile (900–1,000 km) stretch of the Nazca Plate, which subducted under the South American Plate. As the quake occurred just prior to a revolution in seismologic technology in the 1960s, these figures are based mainly on post hoc analysis.

 

The earthquake hit at 3:11 PM approximately 100 miles (160 km) off the coast of Chile, parallel to the city of Valdivia. The shock is generally agreed to have had a magnitude of 9.5, though some studies alternately proposed that it may have been 9.4 or 9.6. A series of foreshocks the previous day had warned of the incipient disaster; one, of magnitude 8.1, caused major destruction in Concepción. The fault-displacement source of the earthquake extended over an estimated 560–620 mile (900–1,000 km) stretch of the Nazca Plate, which subducted under the South American Plate. As the quake occurred just prior to a revolution in seismologic technology in the 1960s, these figures are based mainly on post hoc analysis.

 

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The earthquake hit at 3:11 PM approximately 100 miles (160 km) off the coast of Chile, parallel to the city of Valdivia. The shock is generally agreed to have had a magnitude of 9.5, though some studies alternately proposed that it may have been 9.4 or 9.6. A series of foreshocks the previous day had warned of the incipient disaster; one, of magnitude 8.1, caused major destruction in Concepción. The fault-displacement source of the earthquake extended over an estimated 560–620 mile (900–1,000 km) stretch of the Nazca Plate, which subducted under the South American Plate. As the quake occurred just prior to a revolution in seismologic technology in the 1960s, these figures are based mainly on post hoc analysis.

 

The earthquake hit at 3:11 PM approximately 100 miles (160 km) off the coast of Chile, parallel to the city of Valdivia. The shock is generally agreed to have had a magnitude of 9.5, though some studies alternately proposed that it may have been 9.4 or 9.6. A series of foreshocks the previous day had warned of the incipient disaster; one, of magnitude 8.1, caused major destruction in Concepción. The fault-displacement source of the earthquake extended over an estimated 560–620 mile (900–1,000 km) stretch of the Nazca Plate, which subducted under the South American Plate. As the quake occurred just prior to a revolution in seismologic technology in the 1960s, these figures are based mainly on post hoc analysis.

 

The earthquake hit at 3:11 PM approximately 100 miles (160 km) off the coast of Chile, parallel to the city of Valdivia. The shock is generally agreed to have had a magnitude of 9.5, though some studies alternately proposed that it may have been 9.4 or 9.6. A series of foreshocks the previous day had warned of the incipient disaster; one, of magnitude 8.1, caused major destruction in Concepción. The fault-displacement source of the earthquake extended over an estimated 560–620 mile (900–1,000 km) stretch of the Nazca Plate, which subducted under the South American Plate. As the quake occurred just prior to a revolution in seismologic technology in the 1960s, these figures are based mainly on post hoc analysis.

 

 

 

 

The earthquake hit at 3:11 PM approximately 100 miles (160 km) off the coast of Chile, parallel to the city of Valdivia. The shock is generally agreed to have had a magnitude of 9.5, though some studies alternately proposed that it may have been 9.4 or 9.6. A series of foreshocks the previous day had warned of the incipient disaster; one, of magnitude 8.1, caused major destruction in Concepción. The fault-displacement source of the earthquake extended over an estimated 560–620 mile (900–1,000 km) stretch of the Nazca Plate, which subducted under the South American Plate. As the quake occurred just prior to a revolution in seismologic technology in the 1960s, these figures are based mainly on post hoc analysis

 

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