<Tr> <Td> 1857 - 01 - 09 </Td> <Td> Central--Southern </Td> <Td> 7.9 M </Td> <Td> 7000900000000000000 ♠ IX </Td> <Td> </Td> <Td> </Td> <Td> Severe </Td> <Td> </Td> </Tr> <Tr> <Td> 1838 -?? - 06 </Td> <Td> Bay Area </Td> <Td> 6.8--7.2 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> Minor </Td> <Td> </Td> </Tr> <Tr> <Td> 1812 - 12 - 21 </Td> <Td> Central Coast </Td> <Td> 7.1 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> Tsunami </Td> <Td> </Td> </Tr> <Tr> <Td> 1812 - 12 - 08 </Td> <Td> South Coast </Td> <Td> 6.9--7.5 </Td> <Td> 7000800000000000000 ♠ VII--IX </Td> <Td> 40 </Td> <Td> </Td> <Td> Moderate </Td> <Td> </Td> </Tr>

What is the biggest earthquake ever recorded in california