<Tr> <Td> 1980 - 01 - 24 </Td> <Td> East Bay </Td> <Td> 5.8 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> </Td> <Td> $11.5 million / doublet </Td> <Td> </Td> </Tr> <Tr> <Td> 1979 - 10 - 15 </Td> <Td> Imperial Valley </Td> <Td> 6.4 M </Td> <Td> 7000900000000000000 ♠ IX </Td> <Td> </Td> <Td> 91 </Td> <Td> $30 million </Td> <Td> </Td> </Tr> <Tr> <Td> 1979 - 08 - 06 </Td> <Td> South Bay </Td> <Td> 5.7 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> 16 </Td> <Td> $500,000 </Td> <Td> </Td> </Tr> <Tr> <Td> 1978 - 08 - 13 </Td> <Td> Central Coast </Td> <Td> 5.8 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> 65 </Td> <Td> $12 million </Td> <Td> </Td> </Tr>

What has been the largest earthquake in california