Helena Aftershock 1935-11-28 14:41:48 UTC Region:  Montana Latitude:  46.6000 Longitude:  -112.0000 Depth:  5.00 km Mechanism:  Unknown ML:  5.0 References Jump within page to: [ Choose a Station ] Helena, Mt (Federal Bldg) Add all data on this page to the download bin View Map Helena, MT - Federal Bldg - Park & Clark Epicentral dist: 6.3 km USGS station HFB Site Geology: rock Processing by: USGS Structure: 4-story Bldg Data Available: corrected acceleration, velocity, displacement, & spectra Summary Page for this Station Plot Acceleration Spectra: Log   Lin Add all of this station's data to the download bin Component: 90 PGA (cm/s/s): -83.06 PGV (cm/s): -3.88 Add this to bin Component: 0 PGA (cm/s/s): -74.85 PGV (cm/s): -3.22 Add this to bin Component: Up PGA (cm/s/s): -31.74 PGV (cm/s): -1.42 Add this to bin Return to top