Preserving Historic Records
Detailed Description
An example film chip scan of a long-period vertical seismogram recorded at the WWSSN station KEV (Kevo, Finland). The stamp on the bottom left gives the metadata for this film chip. A calibration pulse is seen at the beginning of the day and at the end. The earthquake recorded on this film chip is the 9 February 1971 M 6.5 San Fernando, California, earthquake.
Sources/Usage
Public Domain.
Related
Preserving Historic Earthquake Records and Photos of the Instruments that Recorded Them
Release Date: FEBRUARY 4, 2019 A project to scan a small selection of the film chips of historical earthquake recordings to digital files was started in 1996. In addition to archiving historic data from the early years, the USGS has also worked to archive photos and descriptions of early seismometers.
Related
Preserving Historic Earthquake Records and Photos of the Instruments that Recorded Them
Release Date: FEBRUARY 4, 2019 A project to scan a small selection of the film chips of historical earthquake recordings to digital files was started in 1996. In addition to archiving historic data from the early years, the USGS has also worked to archive photos and descriptions of early seismometers.