Earthquake 51147027: 09/20/2004 16:51:04 GMT, M=4.80, N38.03 W118.64, 4.63km depth, Bias: pga=0.00 pgv=0.00 

Seismic Stations

Explanation of Flags
M - Manually flagged
T - Outlier
G - Amplitude off scale or below noise
I - Incomplete data
N - Not in list of known stations