Real Time Data from US East Coast
Nelson-Nordgren, Astatic Spring, Broadband Force Balance, Vertical (FBV) Seismometers

Seneca High Gain Output, Filtered for Distant Events

WinSDR updated every 5 minutes. YDivisor = 1, Filtered 0.002 Hz - 0.07 Hz, 100 samples/sec, Scale = 397 nm/s/line, Ag(hi+) = 28,110 V/m/s, Clip Level = 356 um/s


Seneca Low Gain Output, (high gain/50)

Clip Level = 1.8 cm/s

Period Extended High Gain Output

Seneca period extension to 90 seconds, gain divisor set to 1