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Subject
- Geomagnetism10
- Magnetic anomalies10
- Geology6
- CA3
- Earthquake Valley Fault1
- Elsinore Fault1
- Faults (Geology)1
- Geophysical methods1
- Groundwater1
- Historic sites1
- Imperial Co.1
- Landslides1
- Marine sediments1
- Mines and mineral resources1
- Prospecting1
- Railroads1
- Rain and rainfall1
- San Diego Co.1
- San Luis Obispo Co.1
- San Mateo Co.1
