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Analyze the Data A) Using the data in the fourth column of Table 1 calculate the RECURRENCE INTERVAL (RE) (average number of years) between major ruptures of the Mojave Section of the San Andreas fault at Pallett Creek. (Ignore the first and last values in the column when making this calculation - you should have 9 values to calculate RE) B) According to this time between earthquakes (i.e, the recurrence interval), is the Mojave section of the San Andreas fault at Pallett Creek due, not yet due, or well overdue, for a major rupture? (compare your average to the last time it ruptured). C) Look at Table 1 - note the difference between the shortest interval and the longest. • How much greater than your RE is the longest interval between events? • How much smaller is the shortest interval? • Does this give you more or less confidence about your answer to question 2?

Analyze the Data A) Using the data in the fourth column of Table 1 calculate the RECURRENCE INTERVAL (RE) (average number of years) between major ruptures of the Mojave Section of the San Andreas fault at Pallett Creek. (Ignore the first and last values in the column when making this calculation - you should have 9 values to calculate RE) B) According to this time between earthquakes (i.e, the recurrence interval), is the Mojave section of the San Andreas fault at Pallett Creek due, not yet due, or well overdue, for a major rupture? (compare your average to the last time it ruptured). C) Look at Table 1 - note the difference between the shortest interval and the longest. • How much greater than your RE is the longest interval between events? • How much smaller is the shortest interval? • Does this give you more or less confidence about your answer to question 2?

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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Recurrence history, San Andreas fault, Mojave section It is well known that faults don't rupture everywhere at the same time. The San Andreas fault, while a long "continuous" fault, has a varied rupture history. Studies at Pallett Creek (shown in the map below) and other locations along the Mojave section of the San Andreas fault have revealed a rough chronology for that section of the fault over the last 1,500 years -- much longer than covered by historic records of the region. These geologic studies are the basis for our estimate of earthquake risk in this area from this fault segment. D18 | 117° ТЕНАСНАPI MTS Garlock Fault 100 km MOJAVE DESERT San Andreas Fault PC SAN GABRIEL MOUNTAINS WRIGHTWOOD SAN BERNARDINO MOUNTAINS San Jacinto Fault 34 Los Angeles SAN JĂCINTO MTS PACIFIC OCEAN Examine the Earthquake Data Table 1. Previous San Andreas fault EQ ruptures at Pallett Creek (Mojave section) (Probable) Date of Years Until Next EQ "Name" EQ Date Range EQ Event January 9, 1857 greater than 162 January 9, 1857 December 8, 1812 1465 - 1495 A.D. 1329 - 1363 A.D. K 44.08 December 8, 1812 1480 A.D. 332 1346 A.D. 134 H. 1100 A.D. 246 1035 - 1165 A.D. 1015 - 1081 A.D. 981 - 1013 A.D. 775 - 819 A.D. 721 - 747 A.D. 658 - 684 A.D. G F 1048 A.D. 52 997 A.D. 52 E 797 A.D. 200 734 A.D. 63 671 A.D. 63 В before 529 A.D. greater than 142 A ??? - 529 A.D. Table data from: Sieh, K., Stuiver, M. and Brillinger, D. (1989). A More Precise SALTON SEA Elsinore Fault
Transcribed Image Text:Recurrence history, San Andreas fault, Mojave section It is well known that faults don't rupture everywhere at the same time. The San Andreas fault, while a long "continuous" fault, has a varied rupture history. Studies at Pallett Creek (shown in the map below) and other locations along the Mojave section of the San Andreas fault have revealed a rough chronology for that section of the fault over the last 1,500 years -- much longer than covered by historic records of the region. These geologic studies are the basis for our estimate of earthquake risk in this area from this fault segment. D18 | 117° ТЕНАСНАPI MTS Garlock Fault 100 km MOJAVE DESERT San Andreas Fault PC SAN GABRIEL MOUNTAINS WRIGHTWOOD SAN BERNARDINO MOUNTAINS San Jacinto Fault 34 Los Angeles SAN JĂCINTO MTS PACIFIC OCEAN Examine the Earthquake Data Table 1. Previous San Andreas fault EQ ruptures at Pallett Creek (Mojave section) (Probable) Date of Years Until Next EQ "Name" EQ Date Range EQ Event January 9, 1857 greater than 162 January 9, 1857 December 8, 1812 1465 - 1495 A.D. 1329 - 1363 A.D. K 44.08 December 8, 1812 1480 A.D. 332 1346 A.D. 134 H. 1100 A.D. 246 1035 - 1165 A.D. 1015 - 1081 A.D. 981 - 1013 A.D. 775 - 819 A.D. 721 - 747 A.D. 658 - 684 A.D. G F 1048 A.D. 52 997 A.D. 52 E 797 A.D. 200 734 A.D. 63 671 A.D. 63 В before 529 A.D. greater than 142 A ??? - 529 A.D. Table data from: Sieh, K., Stuiver, M. and Brillinger, D. (1989). A More Precise SALTON SEA Elsinore Fault
Analyze the Data A) Using the data in the fourth column of Table 1 calculate the RECURRENCE INTERVAL (RE) (average number of years) between major ruptures of the Mojave Section of the San Andreas fault at Pallett Creek. (Ignore the first and last values in the column when making this calculation - you should have 9 values to calculate RE) B) According to this time between earthquakes (i.e, the recurrence interval), is the Mojave section of the San Andreas fault at Pallett Creek due, not yet due, or well overdue, for a major rupture? (compare your average to the last time it ruptured). C) Look at Table 1 - note the difference between the shortest interval and the longest. • How much greater than your RE is the longest interval between events? • How much smaller is the shortest interval? • Does this give you more or less confidence about your answer to question 2?
Transcribed Image Text:Analyze the Data A) Using the data in the fourth column of Table 1 calculate the RECURRENCE INTERVAL (RE) (average number of years) between major ruptures of the Mojave Section of the San Andreas fault at Pallett Creek. (Ignore the first and last values in the column when making this calculation - you should have 9 values to calculate RE) B) According to this time between earthquakes (i.e, the recurrence interval), is the Mojave section of the San Andreas fault at Pallett Creek due, not yet due, or well overdue, for a major rupture? (compare your average to the last time it ruptured). C) Look at Table 1 - note the difference between the shortest interval and the longest. • How much greater than your RE is the longest interval between events? • How much smaller is the shortest interval? • Does this give you more or less confidence about your answer to question 2?
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