Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 9 January 1987:
Vol. 235. no. 4785, pp. 193 - 195
DOI: 10.1126/science.235.4785.193
Prev | Table of Contents | Next

Articles

Outward-Dipping Ring-Fault Structure at Rabaul Caldera as Shown by Earthquake Locations

JIM MORI 1 and CHRIS MCKEE 1

1 Rabaul Volcanological Observatory, Rabaul, Papua New Guinea.

The locations of a large number of earthquakes recorded at Rabaul caldera in Papua New Guinea from late 1983 to mid-1985 have produced a picture of this active caldera's structural boundary. The earthquake epicenters form an elliptical annulus about 10 kilometers long by 4 kilometers wide, centered in the southern part of the Rabaul volcanic complex. A set of events with well-constrained depth determinations shows a ring-fault structure that extends from the surface to a depth of about 4 kilometers and slopes steeply outward from the center of the caldera. This is the first geophysical data set that clearly outlines the orientation of an active caldera's bounding faults. This orientation, however, conflicts with the configuration of many other calderas and is not in keeping with currently preferred models of caldera formation.

Submitted on July 16, 1986
Accepted on October 27, 1986


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Temporal Variations in U-series Disequilibria in an Active Caldera, Rabaul, Papua New Guinea.
H. S. Cunningham, S. P. Turner, A. Dosseto, H. Patia, S. M. Eggins, and R. J. Arculus (2009)
J. Petrology
   Abstract »    Full Text »    PDF »
How the development of magma chambers affects collapse calderas: insights from an overview.
K. Aizawa, V. Acocella, and T. Yoshida (2006)
Geological Society, London, Special Publications 269, 65-81
   Abstract »    PDF »
Faults and ground uplift at active calderas.
A. Folch and J. Gottsmann (2006)
Geological Society, London, Special Publications 269, 109-120
   Abstract »    PDF »
Deception Island (Bransfield Strait, Antarctica): an example of a volcanic caldera developed by extensional tectonics.
J. Marti, J. Vila, and J. Rey (1996)
Geological Society, London, Special Publications 110, 253-265
   Abstract »    PDF »
Erupting Neighbors--At Last.
S. N. Williams and S. N. Williams (1995)
Science 267, 340-341
   PDF »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)