Publications
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A preliminary survey of the broadband seismic wavefield at Puu Oo, the active vent of Kilauea volcano, Hawaii
The seismic wavefield near an active volcanic vent consists of superimposed signals in a wide range of frequency bands from sources inside and outside the volcano. To characterize the broadband wavefield near Puu Oo, we deployed a profile of three three-component broadband sensors in a 200 m long line about 1.5 km WSW of the active vent. During this period, Puu Oo maintained a constant, but very l
Authors
D. Seidl, M. Hellweg, P. Okubo, H. Rademacher
Chemical analyses of hot springs, pools, and geysers from Yellowstone National Park, Wyoming, and vicinity, 1980-1993
No abstract available.
Authors
J. M. Thompson, J.M. DeMonge
Some facts about aftershocks to large earthquakes in California
Earthquakes occur in clusters. After one earthquake happens, we usually see others at nearby (or identical) locations. To talk about this phenomenon, seismologists coined three terms foreshock , mainshock , and aftershock. In any cluster of earthquakes, the one with the largest magnitude is called the mainshock; earthquakes that occur before the mainshock are called foreshocks while those that occ
Authors
Lucile M. Jones, Paul A. Reasenberg
Rationale and preliminary operational plan for a high-altitude magnetic survey over the United States
A proposed high-altitude survey of the U.S. with an ER-2 to collect radar data offers an exciting and cost-effective opportunity to collect magnetic anomaly data. At this workshop, a group of magnetic specialists addressed this opportunity by discussing the need for high-altitude magnetic data and by formulating a preliminary operational plan to acquire such data. The high-altitude aeromagnetic su
Authors
T. G. Hildenbrand, R. J. Blakely, R. E. Bracken, Lynn Edwards, Doug Hardwick, W. J. Hinze, Vic Labson, Hal Malliot, Misac Nabighian, Bruno Nilsson, Jeff Phillips, J.M. Quinn, Walter Roest
Direct temperature measurements of deposits, Mount St. Helens, Washington, 1980-1981
A program of temperature studies of the eruptive products of Mount St. Helens was established May 20, 1980, 2 days after the catastrophic eruption of May 18. Temperature-depth profiles were measured by thermocouple to determine the emplacement temperatures of deposits of the debris avalanche and blast of May 18 and of deposits of the pyroclastic flows of May 18, May 25, June 12, July 22, August 7,
Authors
Norman G. Banks, Richard P. Hoblitt
Descriptions, photographs, and coordinates for Global Positioning System stations at Aniakchak Crater, Alaska
No abstract available.
Authors
K.M. Yamashita, E.Y. Iwatsubo, J.J. Dvorak
Electron microprobe analyses of zeolite minerals from Neogene volcanic rocks in the Breitenbush-Austen Hot Springs area, Oregon
No abstract available.
Authors
R.L. Oscarson, K.E. Bargar
Volcanic activity in Alaska: summary of events and response of the Alaska Volcano Observatory 1993
During 1993, the Alaska Volcano Observatory (AVO) responded to episodes of eruptive activity or false alarms at nine volcanic centers in the state of Alaska. Additionally, as part of a formal role in KVERT (the Kamchatkan Volcano Eruption Response Team), AVO staff also responded to eruptions on the Kamchatka Peninsula, details of which are summarized in Miller and Kurianov (1993).
In 1993, AVO ma
Authors
Christina A. Neal, Robert G. McGimsey, Michael P. Doukas
Field test of two single-frequency GPS receivers
The U.S. Geological Survey's Cascades Volcano Observatory (CVO) has been testing low-cost, low-power Global Positioning System (GPS) receivers for use in the monitoring of restless volcanoes. Field tests of two single-frequency (L1 only) receivers, the Ashtech SCA-12S and the Leica SR261 show that these units can measure positions precisely enough to meet our monitoring needs. For line lengths up
Authors
E.Y. Iwatsubo
Resource assessment of the Bureau of Land Management's Winnemucca District and Surprise Resource Area, Northwest Nevada and Northeast California; geology and its relation to resource genesis
The U.S. Geological Survey (USGS) is a party to joint interagency Memorandum of Understandings (MOUs) with the Bureau of Land Management (BLM) and the U.S. Bureau of Mines (USBM) to coordinate resource assessments and evaluations of BLM administered lands. Resource assessments of BLM Resource Areas, that are conducted by the USGS under these MOUs, assist the BLM in meeting inventory and evaluation
Authors
J. L. Doebrich
Global volcanic earthquake swarm database 1979-1989
Earthquake swarms are pervasive at volcanoes, but have seldom been studied systematically. Most swarms that are described in the literature are those that occurred in association with eruptions; indeed, earthquake swarms are the most reliable method of forecasting eruptions. For the purpose of this report, a swarm is defined as many earthquakes of the same size occurring in a small volume. Swarms
Authors
J.P. Benoit, S.R. McNutt
Hazards and climatic impact of subduction‐zone volcanism: A global and historical perspective
Subduction-zone volcanoes account for more than 80 percent of the documented eruptions in recorded history, even though volcanism--deep and, hence, unobserved--along the global oceanic ridge systems overwhelmingly dominates in eruptive output. Because subduction-zone eruptions can be highly explosive, they pose some of the greatest natural hazards to society if the eruptions occur in densely popul
Authors
Robert I. Tilling