This research used results and samples and/or data provided by the Ocean Drilling Program (ODP). ODP is sponsored by the U.S. National Science Foundation (NSF) and participating countries under management of Joint Oceanographic Institutions (JOI), Inc. The authors express great thanks to the crew of the JOIDES Resolution, the operating staff of the JOIDES Resolution, and the shipboard scientists of Leg 200. The authors express their thanks to Drs. Robert N. Harris, Gary Acton, and an anonymous reviewer for their valuable comments. Their suggestions greatly contributed to improve the manuscript. The Hawaii-2 Observatory broadband seismometer data were distributed by the IRIS Data Management Center in Seattle.