<Tr> <Td> 000000001857 - 01 - 09 - 0000 January 9, 1857 </Td> <Td> California </Td> <Td> 7.9 </Td> <Td> 7000200000000000000 ♠ 2 </Td> <Td> 1857 Fort Tejon earthquake </Td> <Td> </Td> </Tr> <Tr> <Td> 000000001867 - 04 - 24 - 0000 April 24, 1867 </Td> <Td> Kansas </Td> <Td> 5.1 </Td> <Td> 5000000000000000000 ♠ 0 </Td> <Td> 1867 Manhattan, Kansas earthquake </Td> <Td> </Td> </Tr> <Tr> <Td> 000000001868 - 04 - 02 - 0000 April 2, 1868 </Td> <Td> Hawaii </Td> <Td> 7.9 </Td> <Td> 7001770000000000000 ♠ 77 </Td> <Td> 1868 Hawaii earthquake and tsunami </Td> <Td> </Td> </Tr> <Tr> <Td> 000000001868 - 10 - 21 - 0000 October 21, 1868 </Td> <Td> California </Td> <Td> 6.3--6.7 </Td> <Td> 7001300000000000000 ♠ 30 </Td> <Td> 1868 Hayward earthquake </Td> <Td> </Td> </Tr>

How many earthquakes in the us per year