Earthquake 33090: 1/20/2004 03:04:48 AKST, M=2.8, N61.70 W150.00, 25km 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