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Influence of volcanic activity at Mauna Loa, Hawaii, on earthquake occurrence in the Kaoiki Seismic Zone
 

Summary: Influence of volcanic activity at Mauna Loa, Hawaii, on earthquake
occurrence in the Kaoiki Seismic Zone
Thomas R. Walter and Falk Amelung
MGG, RSMAS - University of Miami, Miami, Florida, USA
Received 21 November 2003; revised 1 February 2004; accepted 9 March 2004; published 15 April 2004.
[1] The Kaoiki Seismic Zone at Mauna Loa's east flank is
the locus of some of the largest earthquakes on Hawaii. In
this paper we examine the link of those earthquakes to
volcanic activity at Mauna Loa. We calculate the changes of
Coulomb failure stress along the Kaoiki faults for typical
volcanic events at Mauna Loa volcano. We simulate the
dislocation associated with the 1950 eruption at the
Southwest Rift Zone, the 1984 eruption at the Northeast
Rift Zone, and the subsequent replenishment of the shallow
magma chamber. Our model calculations suggest that the
earthquake occurrence in the Kaoiki Seismic Zone strongly
depends on the type of volcanic activity. Kaoiki earthquakes
are encouraged by dike intrusions into the Southwest Rift
Zone of Mauna Loa, but discouraged by dike intrusion into
the Northeast Rift Zone. Inflation of a shallow magma

  

Source: Amelung, Falk - Rosenstiel School of Marine and Atmospheric Sciences, University of Miami
Miami, University of - Geodesy Laboratory

 

Collections: Geosciences