Description
Digitized seismograms and event catalogues from a small observatory that recorded 40 thousand earthquakes, most of them too faint to feel.
Provenance
Donated by the creator’s family in 2007. The tape was sticky with binder breakdown and was baked at low temperature before a single careful read. The image matches a checksum published by the original distributor.
Preservation
- Fixity (SHA-256)
e5a2a6528867b3628c866c3a0cefe54ab676dfcc5b1f894fe9a67a7cf77c2097- Last verified
- Oct 12, 2026, by Vigil
- Migrated to
- CSV with a data dictionary, with the original files kept
- Copies
- Three, on two kinds of storage, in two cities
- Original carriers
- Kept in cold storage in Vancouver
Access
Free, in the Lazarus reading room in Vancouver and in partner reading rooms. Copies may be taken away.
Reading-room copies are migrated to CSV with a data dictionary, with the original files kept. The recovered files are kept exactly as they were found.
Cite as: Willowridge Observatory, Seismograms, Willowridge Observatory, 1986–1999 (1986–1999). Lazarus Archive, LZ-09976.