Localized compressional velocity decrease precursory to the Kalapana, Hawaii, earthquake
Johnston AC. 1978. Localized compressional velocity decrease precursory to the Kalapana, Hawaii, earthquake. Science. 199(4331):882-885
A delay in the arrival times of compressional or P waves of 015 to 0 2 second from deep distant earthquakes has been detected at the closest seismograph station to the 20 November 1975 earthquake at Kalapana, Hawaii (surface-wave magnitude Ms = 7 2) This delay appeared approximately 3 5 years prior to the quake, and travel times returned to normal several months before it The P-wave arrival times at other nearby stations remained constant during this period, an indication that the decreased velocity implied by the delay in travel time was associated with this normal-faulting earthquake and was confined to distances less than 20 kilometers from the epicenter
- Type
- Journal Article
- Authors
- Johnston, A
- Units
- HAVO
- Keywords
- 1975-11-29, Earthquake, Hawaii (Big Island), Kilauea South Flank, Kilauea Volcano, Mechanism, Precursor