摘要:

Large intraplate earthquakes have an almost universal property of occurring in unexpected places, and on March 30, 1986, the Marryat Creek earthquake confirmed this behavioral pattern. The earthquake took place in central Australia (26.2°S, 132.8°E) in a region that was cratonized in the Early to Middle Proterozoic and that has no record of significant previous seismic activity. The main earthquake had a magnitude ofMs∼5.8 and was associated with a surface fault scarp that is in the shape of a boomerang (convex to the northeast) ∼13 km long, with a maximum displacement of 0.8 m. A preliminary fault plane solution for the earthquake indicates that the mechanism was a combination of thrust and strike‐slip faulting, with the pressure axis striking at

ISSN:0002-8606    

DOI:10.1029/EO068i026p00609

年代:1987

数据来源: WILEY

摘要:

Periodic Spring discharges cold water from an unenterable cave in the Madison Limestone along the axis of the Periodic anticline in the Absaroka thrust sheet of the Salt River Range of western Wyoming. As shown on the cover, the spring “turns on and off with variable cyclicity during low discharge stages. The intermittent yield is not the result of hydrothermal activity; rather, it is caused by the mechanical operation of a siphon in the cave behind the sprin

ISSN:0002-8606    

DOI:10.1029/EO068i026p00610-01

年代:1987

数据来源: WILEY

摘要:

The Hydrology Program of the 1986 AGU Fall Meeting held in San Francisco, Calif., in December was truly a success, thanks to the session organizers and participants. There were 28 half‐day sessions, two of which were poster sessions. A total of 330 presentations were given, 71 of which were poster presentations. I am particularly pleased with the success that our poster sessions had. The feedback on the posters has been extremely positive, and this is a good indication that posters are by no means “second class.” The Hydrology Section committees are considering the organization of a few of their special theme sessions as half‐day poster sessions to be held in a meeting area smaller than Brooks Hall, where poster sessions were held last time. I would appreciate any suggestions that you may have to improve our hydrology meeting

ISSN:0002-8606    

DOI:10.1029/EO068i026p00611-01

年代:1987

数据来源: WILEY

摘要:

Science and technology centers, as proposed by President Ronald Reagan in his January 1987 State of the Union message, could make “significant contributions to science and to the nation's economic competitiveness,” according to a new report by a National Academy of Sciences (NAS) panel. What will be necessary to realize these contributions, the panel cautioned, are proper management, adequate resources, and, “above all, the selection of programs for which the centers are the most effective form of organization.”NSF plans to support science and technology centers, beginning October 1, 1988, which is the start of fiscal year 1988. NSF requested guidance from the NAS panel in implementing the program. Although other government agencies will participate in the program, NSF will play the prima

ISSN:0002-8606    

DOI:10.1029/EO068i026p00612-03

年代:1987

数据来源: WILEY

摘要:

One of the summits of Kit Carson Mountain in the Sangre de Cristo range in south‐central Colorado will be named “Challenger Point” in memory of the seven astronauts who died in the U.S. space shuttle disaster in January 1986. Challenger Point is a well‐defined summit that appears to be piggybacked onto Kit Carson Mountain, just as the space shuttleChallengerwas to its main booster rocket.The newly named summit is about 6 km northeast of Cottonwood, Colo., and 8 km east of Crestone, Colo. The 4292‐m‐high point is located at 37°59

ISSN:0002-8606    

DOI:10.1029/EO068i026p00613-01

年代:1987

数据来源: WILEY