Margaret Mangan, Ph.D. (Former Employee)
Science and Products
USGS science in Menlo Park -- a science strategy for the U.S. Geological Survey Menlo Park Science Center, 2005-2015
In the spring of 2004, the U.S. Geological Survey (USGS) Menlo Park Center Council commissioned an interdisciplinary working group to develop a forward-looking science strategy for the USGS Menlo Park Science Center in California (hereafter also referred to as "the Center"). The Center has been the flagship research center for the USGS in the...
Brocher, Thomas M.; Carr, Michael D.; Halsing, David L.; John, David A.; Langenheim, Victoria E.; Mangan, Margaret T.; Marvin-DiPasquale, Mark C.; Takekawa, John Y.; Tiedeman, Claire
Hawaiian Volcano Observatory; summary 93, part I; seismic data, January to December 1993; chronological summary
Nakata, J.S.; Mattox, T.N.; Okubo, P.G.; Tomori, A.H.; Tanigawa, W.R.; Mattox, T.; Heliker, C.; Mangan, Margaret
Pu'u 'Ō'ō-Kūpaianaha eruption of Kilauea, November 1991-February 1994; field data and flow maps
The Pu'u 'Ō'ō-Kūpaianaha eruption on the east rift zone of Kīlauea, which began in January 1983, is the longest-lived rift zone eruption of the last two centuries. By 1994, a broad field of lava, nearly 1 km3 in volume and 12 km wide at the coast, had buried 87 km2 of the volcano's south flank. The initial six months of fissure eruptions (episodes...
Heliker, C. Christina; Mangan, Margaret T.; Mattox, Tari N.; Kauahikaua, James P.
The Pu'u O'o-Kupaianaha eruption of Kilauea Volcano; June 1990 through August 1994 lava sample archive
No abstract available.
Mangan, Margaret T.; Heliker, C.C.; Mattox, T.N.; Kauahikaua, J. P.; Helz, Rosalind Tuthill; Hearn, B.C.
Timelapse film logs from the PuuOo-Kupaianaha eruption of Kilauea Volcano; January 1983 through September 1994
Mattox, Tari N.; Heliker, C.C.; Hoffman, J.P.; Hon, Ken; Mangan, M.T.; Neal, C.A.; Ulrich, G.E.; Wolfe, E.W.
Hawaiian Volcano Observatory; Summary 91
Nakata, J.S.; Tomori, A.H.; Tokuuke, J.P.; Tanigawa, W.R.; Okubo, P.G.; Heliker, C.C.; Mangan, M.T.; Mattox, T.N.; Kauahikaua, J. P.
Chemical data for flows and feeder dikes of the Yakima Basalt Subgroup, Columbia River Basalt Group, Washington, Oregon, and Idaho, and their bearing on a petrogenetic model
Wright, Thomas L.; Mangan, Margaret T.; Swanson, Donald A.
The distribution of vesicles and olivine phenocrysts in samples from drill hole KI 79-3, Kilauea Iki lava lake, Hawaii
Mangan, M.T.; Helz, Rosalind Tuthill
Major oxide, trace element, and glass chemistry pertinent to regional correlation of Grande-Ronde Basalt flows, Columbia River Basalt Group, Washington
Mangan, M.T.; Wright, T.L.; Swanson, D.A.; Byerly, G.R.
Volcano Watch — A look back at powerful Halemaumau eruptions of 1924
Precisely 74 years ago today, the final chapter of one of Kīlauea's most alarming displays of volcanic power came to a close. Halema`uma`u, the fire pit nestled in Kīlauea's summit caldera, ended a 10-day-long outburst of violent steam explosions on May 24, 1924.
Volcano Watch — Volcano: Will it Flow or Blow?
A gentle, effusive style of activity has characterized the ongoing eruption of Kīlauea for well over a decade now. But remember the explosive episodes of 1983, `84, `85 and the first half of `86? Pu`u `O`o burst forth periodically with towering lava fountains that could be seen for miles around. Ever wonder why the change? Just what causes a volcano to flow rather than blow?
Volcano Watch — Volcanoes make headlines!
Kīlauea made the headlines once again last week with the threat of a summit eruption and a brief surge in activity that sent lava flows coursing down the pali in Hawaii Volcanoes National Park.
Volcano Watch — November earthquakes
November is a month that always makes HVO seismologist Jennifer Nakata a little nervous. Nakata says her discomfort surfaces about this time each year as she recalls two of the Big Island's most damaging earthquakes, the magnitude-7.2 Kalapana quake that struck on November 29, 1975 and the magnitude 6.6 Ka`oiki quake that shook the island on November 16, 1983.
Volcano Watch — Director of the USGS announces retirement
The Director of the U.S. Geological Survey, Gordon Eaton, announced his retirement last week at the agency's National Center in Reston, VA. Dr. Eaton was appointed to the post by President Clinton in 1994. When he retires on October 1 of this year, Dr. Eaton will have completed over 17 years of public service under the USGS banner.
Volcano Watch — Update on Soufriere Hills, Montserrat
Last Friday, July 18, marked the two-year anniversary of the ongoing eruption of Soufriere Hills volcano on the small Caribbean island of Montserrat. The sulfurous gases, drifting ash clouds, and avalanches of hot rock that periodically burgeon from the volcano have inflicted social and economic hardships that have become increasingly difficult for islanders to bear.
Volcano Watch — HVO goes to the movies!
A few evenings ago the staff of the Hawaiian Volcano Observatory took a field trip to Prince Kuhio Plaza to see the latest disaster film, VOLCANO! Generally, we on the Big Island take volcanic phenomena very seriously.
Volcano Watch — Thomas Jaggar, HVO
Dr. Thomas L . Wright, HVO's Scientist-in-Charge from 1984 to 1991, returned to the Big Island for a short visit last week to conduct studies of the fault systems cutting Kīlauea's south flank. As a scientist, Wright is best known for his pivotal research on the geochemistry of Hawaiian lava.
Volcano Watch — The Montserrat dome
Last Thursday, scientists at HVO's sister observatory in Vancouver, Washington (the USGS Cascades Volcano Observatory, or CVO) received a distress call from concerned officials on the small Caribbean Island of Montserrat.
Volcano Watch — Pavlof Volcano, Alaska
USGS geologist Tina Neal reports from HVO's sister observatory in Anchorage (AVO) that Pavlof, the recently awakened volcano at the tip of Alaska Peninsula, is spewing fiery fountains of lava up to 900 feet in the air.
Volcano Watch — Geologic hazards
The primary mission of the Hawaiian Volcano Observatory (HVO) is to evaluate earthquake and volcanic hazards and provide timely information to the various State and County officials responsible for emergency preparedness and response.
Volcano Watch — Growth of Lō‘ihi Seamount
Floating hydrophones and sonobuoys recorded the crackling and grinding noises that are often indicative of an ongoing submarine eruption, but the University of Hawaii Pisces V dive team and their USGS, Bishop Museum, and University of Washington collaborators found no red lava or active eruptive vents as they explored the underwater world of Lo`ihi volcano last week.