Assembled Western United States Dataset for Regional Seismic Analysis

摘要

Regional seismic research is largely data driven. Under the current global moratoria on underground nuclear testing, the number of digital seismic records of these tests at regional distances is quite restricted both in number and geographical location. We believe the finite number of existing regional nuclear test records are a unique resource that has not been fully exploited, in part because of limited data availability. There have been a number of data compilations of nuclear explosions seismic records in Eurasia (e.g. Borovoye: Kim and Ekstrom, 1996; PNE lines: Morozov et al., 2004; JVE: Priestley et al., 1990). At the United States Nevada Test Site (NTS) there have been several hundred contained underground nuclear explosions starting with 'Rainier' in September 1957 and ending with 'Divider' in September 1992 (Springer et al. 2003). We collected data from a number of stations in the western U.S. that had long operating histories where we could compile a good dataset containing of some of these explosions as well as earthquakes and other events for comparison. Here we have assembled on a DVD a subset of 151 regional distance events. The dataset includes 73 nuclear explosions, 61 earthquakes, 3 collapse events, 1 large chemical explosion and 13 mine-related explosions. The emphasis in this project was on data from Lawrence Livermore National Laboratory (LLNL)-managed stations MNA, ELK, KNB and LAC that recorded many nuclear tests and nearby earthquakes in broadband digital form since 1980, along with a small number of earlier events that were digitized from tapes. Through the generous cooperation of Sandia National Laboratory (SNL) we have also included waveforms from their Leo Brady network (BMN, DWN, LDS, NEL,TON). In addition we include data from other open broadband stations in the western US with long operating histories and/or ties to the International Monitoring System (IMS) (e.g. PFO, YKA, CMB, NEW, DUG, ANMO, TUC). These waveforms are associated with a reconciled catalog of events and station response information to facilitate analysis. The goal was to create a high-quality database that can be used in the future to analyze fundamental regional monitoring issues such as detection, location, magnitude, and discrimination. We hope this well-organized and compact set of data will prove useful for regional seismic research and for benchmarking seismic monitoring algorithms in detection, location, identification and magnitude yield estimation.