Imperi  search
Imperial County California  search
BTUnited States
 .California
 ..Imperial County California
NTBrawley Fault
 Cargo Muchacho Mountains
 East Mesa KGRA
 El Centro California
 Imperial Fault
 Salton Sea geothermal field
RTAnza-Borrego Desert State Park
 Mexicali Valley
 Chocolate Mountains
 Salton Sea
 San Jacinto Fault
SNS California.
Imperial Fault  search
BTUnited States
 .California
 ..Imperial County California
 ...Imperial Fault
RTImperial Valley
SNImperial Valley, California. Added to Thesaurus in 1989.
Imperial Formation  search
RTCalifornia
 Miocene
 Pliocene
SNPliocene and Miocene in S California. Formerly considered Pleistocene. Also occurs in other locations. Indexed with ages as applicable. Added to Thesaurus in 1985.
Imperial Valley  search
RTBaja California
 Borrego Mountain earthquake 1968
 California
 Colorado Desert
 East Mesa KGRA
 El Centro California
 El Centro earthquake 1940
 Imperial Fault
 Imperial Valley earthquake 1979
 Mexicali Valley
SNImperial County in extreme SE California and Baja California, Mexico. Indexed with counties or regions as applicable.
Imperial Valley earthquake 1940  search
USEEl Centro earthquake 1940
Imperial Valley earthquake 1979  search
BTearthquakes
 .Imperial Valley earthquake 1979
RTCalifornia
 Imperial Valley
SNEpicenter in Imperial Valley, S California. Added to Thesaurus in 1985.