Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by LI, Y. Articles by THURBER, C. H. Search for Related Content GeoRef GeoRef Citation

Source properties of two microearthquakes at Kilauea Volcano, Hawaii

DEPARTMENT OF EARTH AND SPACE SCIENCES STATE UNIVERSITY OF NEW YORK AT STONY BROOK, STONY BROOK, NEW YORK 11794

Abstract

The source-time functions of two microearthquakes with magnitudes 2.1 and 2.3 at Kilauea Volcano, Hawaii, are determined by using the deconvolution technique. P-wave seismograms of a smaller event with magnitude 1.6 in a nearby location are treated as empirical Green's functions and deconvolved from the waveforms of the larger earthquakes by spectral division. From the time-domain analysis of the source-time functions, some of the source properties, such as the complexity and directivity, and some of the source parameters, such as pulse width, rise time, and source dimension, are determined. With a good azimuthal distribution of stations, the direction and magnitude of rupture velocity are estimated for one of the events. The rupture direction is about N85°W and rupture velocity is 0.75 V_s, assuming V_p = 1.73 V_s. The result for direction agrees with one of the nodal planes of the focal mechanism. Our results indicate that there exist obvious variations in rupture durations for nearby small events with similar seismic moments, suggesting significant differences in the static stress drops. The stress drops of two events (1.5 and 16.5 bar) estimated from the rise times differ by an order of magnitude, implying heterogeneity of the stress distribution over this small area.

This article has been cited by other articles:

				M. L. Jost, T. Busselberg, O. Jost, and H.-P. Harjes Source parameters of injection-induced microearthquakes at 9 km depth at the KTB Deep Drilling site, Germany Bulletin of the Seismological Society of America, June 1, 1998; 88(3): 815 - 832. [Abstract] [PDF]

				J. Mori Rupture directivity and slip distribution of the M 4.3 foreshock to the 1992 Joshua Tree earthquake, Southern California Bulletin of the Seismological Society of America, June 1, 1996; 86(3): 805 - 810. [Abstract] [PDF]

				Y. Li, C. Doll Jr., and M. N. Toksoz Source characterization and fault plane determination for MbLg = 1.2 to 4.4 earthquakes in the Charlevoix Seismic Zone, Quebec, Canada Bulletin of the Seismological Society of America, December 1, 1995; 85(6): 1604 - 1621. [Abstract] [PDF]

				K. D. SMITH and K. F. PRIESTLEY Aftershock stress release along active fault planes of the 1984 Round Valley, California, earthquake sequence applying a time-domain stress drop method Bulletin of the Seismological Society of America, February 1, 1993; 83(1): 144 - 159. [Abstract] [PDF]

				J. XIE, Z. LIU, R. B. HERRMANN, and E. CRANSWICK Source processes of three aftershocks of the 1983 Goodnow, New York, earthquake: High-resolution images of small, symmetric ruptures Bulletin of the Seismological Society of America, June 1, 1991; 81(3): 818 - 843. [Abstract] [PDF]

				J. MORI and S. HARTZELL Source inversion of the 1988 Upland, California, earthquake: Determination of a fault plane for a small event Bulletin of the Seismological Society of America, June 1, 1990; 80(3): 507 - 518. [Abstract] [PDF]

				J. MORI and A. FRANKEL Source parameters for small events associated with the 1986 North Palm Springs, California, earthquake determined using empirical Green functions Bulletin of the Seismological Society of America, April 1, 1990; 80(2): 278 - 295. [Abstract] [PDF]