Preserving Historic Records
![An example film chip scan of a long-period vertical seismogram](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Preserving%20Historic%20Earthquake%20Records-%202.gif?itok=boAMbb10)
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.