Premium
Application of near real‐time radial semblance to locate the shallow magmatic conduit at Kilauea Volcano, Hawaii
Author(s) -
Dawson P.,
Whilldin D.,
Chouet B.
Publication year - 2004
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl021163
Subject(s) - geology , sill , electrical conduit , volcano , seismology , impact crater , caldera , dike , magma , petrology , mechanical engineering , physics , astronomy , engineering
Radial Semblance is applied to broadband seismic network data to provide source locations of Very‐Long‐Period (VLP) seismic energy in near real time. With an efficient algorithm and adequate network coverage, accurate source locations of VLP energy are derived to quickly locate the shallow magmatic conduit system at Kilauea Volcano, Hawaii. During a restart in magma flow following a brief pause in the current eruption, the shallow magmatic conduit is pressurized, resulting in elastic radiation from various parts of the conduit system. A steeply dipping distribution of VLP hypocenters outlines a region extending from sea level to about 550 m elevation below and just east of the Halemaumau Pit Crater. The distinct hypocenters suggest the shallow plumbing system beneath Halemaumau consists of a complex plexus of sills and dikes. An unconstrained location for a section of the conduit is also observed beneath the region between Kilauea Caldera and Kilauea Iki Crater.