Seth Moran, Ph.D.
My professional career has largely been devoted to the study of active volcanoes and volcano seismology, with a hiatus in 2015-2020 to serve as the Scientist-in-Charge of the Cascades Volcano Observatory. I am interested in all things volcanoes and seismology, as well as hazards in general.
Science and Products
Filter Total Items: 58
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2002
The Alaska Volcano Observatory (AVO), a cooperative program of the U.S. Geological Survey, the Geophysical Institute of the University of Alaska Fairbanks, and the Alaska Division of Geological and Geophysical Surveys, has maintained seismic monitoring networks at historically active volcanoes in Alaska since 1988 (Power and others, 1993; Jolly and others, 1996; Jolly and others, 2001...
Authors
James P. Dixon, Scott D. Stihler, John A. Power, Guy Tytgat, Seth C. Moran, John J. Sanchez, Steve Estes, Stephen R. McNutt, John F. Paskievitch
The 2002 Denali fault earthquake, Alaska: A large magnitude, slip-partitioned event
The MW (moment magnitude) 7.9 Denali fault earthquake on 3 November 2002 was associated with 340 kilometers of surface rupture and was the largest strike-slip earthquake in North America in almost 150 years. It illuminates earthquake mechanics and hazards of large strike-slip faults. It began with thrusting on the previously unrecognized Susitna Glacier fault, continued with right-slip...
Authors
Donna Eberhart-Phillips, Peter J. Haeussler, J.T. Freymueller, A.D. Frankel, C.M. Rubin, P. A. Craw, N. A. Ratchkovski, G. S. Anderson, G. A. Carver, A. J. Crone, T. E. Dawson, H. Fletcher, R. P. Hansen, E. L. Harp, Ruth A. Harris, D.P. Hill, Sigrun Hreinsdottir, R.W. Jibson, L.M. Jones, R. E. Kayen, D. K. Keefer, C.F. Larsen, Seth C. Moran, Stephen Personius, George Plafker, B. Sherrod, Kerry E. Sieh, N. Sitar, W. K. Wallace
Multiple seismogenic processes for high-frequency earthquakes at Katmai National Park, Alaska: Evidence from stress tensor inversions of fault-plane solutions
The volcanological significance of seismicity within Katmai National Park has been debated since the first seismograph was installed in 1963, in part because Katmai seismicity consists almost entirely of high-frequency earthquakes that can be caused by a wide range of processes. I investigate this issue by determining 140 well-constrained first-motion fault-plane solutions for shallow...
Authors
Seth C. Moran
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1, 2000 through December 31, 2001
The Alaska Volcano Observatory (AVO), a cooperative program of the U.S. Geological Survey, the Geophysical Institute of the University of Alaska Fairbanks, and the Alaska Division of Geological and Geophysical Surveys, has maintained seismic monitoring networks at potentially active volcanoes in Alaska since 1988 (Power and others, 1993; Jolly and others, 1996; Jolly and others, 2001)...
Authors
James P. Dixon, Scott D. Stihler, John A. Power, Guy Tytgat, Steve Estes, Seth C. Moran, John F. Paskievitch, Stephen R. McNutt
A tectonic earthquake sequence preceding the April-May 1999 eruption of Shishaldin Volcano, Alaska
On 4 March 1999, a shallow ML 5.2 earthquake occurred beneath Unimak Island in the Aleutian Arc. This earthquake was located 10-15 km west of Shishaldin Volcano, a large, frequently active basaltic-andesite stratovolcano. A Strombolian eruption began at Shishaldin roughly 1 month after the mainshock, culminating in a large explosive eruption on 19 April. We address the question of...
Authors
Seth C. Moran, S.D. Stihler, J.A. Power
Magmatic inflation at a dormant stratovolcano: 1996-1998 activity at Mount Peulik volcano, Alaska, revealed by satellite radar interferometry
A series of ERS radar interferograms that collectively span the time interval from July 1992 to August 2000 reveal that a presumed magma body located 6.6 ??? 0.5 km beneath the southwest flank of the Mount Peulik volcano inflated 0.051 ??? 0.005 km3 between October 1996 and September 1998. Peulik has been active only twice during historical time, in 1814 and 1852, and the volcano was...
Authors
Zhong Lu, Charles W. Wicks, Daniel Dzurisin, John A. Power, Seth C. Moran, Wayne R. Thatcher
Seismic response of the katmai volcanoes to the 6 December 1999 magnitude 7.0 Karluk Lake earthquake, Alaska
A sudden increase in earthquake activity was observed beneath volcanoes in the Katmai area on the Alaska Peninsula immediately following the 6 December 1999 magnitude (Mw) 7.0 Karluk Lake earthquake beneath southern Kodiak Island, Alaska. The observed increase in earthquake activity consisted of small (ML 1.3), shallow (Z 5.0 km) events. These earthquakes were located beneath Mount...
Authors
J.A. Power, Seth C. Moran, S.R. McNutt, S.D. Stihler, J.J. Sanchez
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1, 1994 through December 31, 1999
The Alaska Volcano Observatory (AVO), a cooperative program of the U.S. Geological Survey, the Geophysical Institute of the University of Alaska - Fairbanks, and the Alaska Division of Geological and Geophysical Surveys, has maintained a seismic monitoring program at potentially active volcanoes in Alaska since 1988 (Power and others, 1993; Jolly and others, 1996). The primary objectives...
Authors
Arthur D. Jolly, Scott D. Stihler, John A. Power, John C. Lahr, John F. Paskievitch, Guy Tytgat, Steve Estes, Andrew Lockhart, Seth C. Moran, Stephen R. McNutt, William R. Hammond
A model for the magmatic-hydrothermal system at Mount Rainier, Washington, from seismic and geochemical observations
Mount Rainier is one of the most seismically active volcanoes in the Cascade Range, with an average of one to two high-frequency volcano-tectonic (or VT) earthquakes occurring directly beneath the summit in a given month. Despite this level of seismicity, little is known about its cause. The VT earthquakes occur at a steady rate in several clusters below the inferred base of the...
Authors
Seth C. Moran, D. R. Zimbelman, S. D. Malone
P wave crustal velocity structure in the greater Mount Rainier area from local earthquake tomography
We present results from a local earthquake tomographic imaging experiment in the greater Mount Rainier area. We inverted P wave arrival times from local earthquakes recorded at permanent and temporary Pacific Northwest Seismograph Network seismographs between 1980 and 1996. We used a method similar to that described by Lees and Crosson [1989], modified to incorporate the parameter...
Authors
Seth C. Moran, J.M. Lees, S. D. Malone
Science and Products
Filter Total Items: 58
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2002
The Alaska Volcano Observatory (AVO), a cooperative program of the U.S. Geological Survey, the Geophysical Institute of the University of Alaska Fairbanks, and the Alaska Division of Geological and Geophysical Surveys, has maintained seismic monitoring networks at historically active volcanoes in Alaska since 1988 (Power and others, 1993; Jolly and others, 1996; Jolly and others, 2001...
Authors
James P. Dixon, Scott D. Stihler, John A. Power, Guy Tytgat, Seth C. Moran, John J. Sanchez, Steve Estes, Stephen R. McNutt, John F. Paskievitch
The 2002 Denali fault earthquake, Alaska: A large magnitude, slip-partitioned event
The MW (moment magnitude) 7.9 Denali fault earthquake on 3 November 2002 was associated with 340 kilometers of surface rupture and was the largest strike-slip earthquake in North America in almost 150 years. It illuminates earthquake mechanics and hazards of large strike-slip faults. It began with thrusting on the previously unrecognized Susitna Glacier fault, continued with right-slip...
Authors
Donna Eberhart-Phillips, Peter J. Haeussler, J.T. Freymueller, A.D. Frankel, C.M. Rubin, P. A. Craw, N. A. Ratchkovski, G. S. Anderson, G. A. Carver, A. J. Crone, T. E. Dawson, H. Fletcher, R. P. Hansen, E. L. Harp, Ruth A. Harris, D.P. Hill, Sigrun Hreinsdottir, R.W. Jibson, L.M. Jones, R. E. Kayen, D. K. Keefer, C.F. Larsen, Seth C. Moran, Stephen Personius, George Plafker, B. Sherrod, Kerry E. Sieh, N. Sitar, W. K. Wallace
Multiple seismogenic processes for high-frequency earthquakes at Katmai National Park, Alaska: Evidence from stress tensor inversions of fault-plane solutions
The volcanological significance of seismicity within Katmai National Park has been debated since the first seismograph was installed in 1963, in part because Katmai seismicity consists almost entirely of high-frequency earthquakes that can be caused by a wide range of processes. I investigate this issue by determining 140 well-constrained first-motion fault-plane solutions for shallow...
Authors
Seth C. Moran
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1, 2000 through December 31, 2001
The Alaska Volcano Observatory (AVO), a cooperative program of the U.S. Geological Survey, the Geophysical Institute of the University of Alaska Fairbanks, and the Alaska Division of Geological and Geophysical Surveys, has maintained seismic monitoring networks at potentially active volcanoes in Alaska since 1988 (Power and others, 1993; Jolly and others, 1996; Jolly and others, 2001)...
Authors
James P. Dixon, Scott D. Stihler, John A. Power, Guy Tytgat, Steve Estes, Seth C. Moran, John F. Paskievitch, Stephen R. McNutt
A tectonic earthquake sequence preceding the April-May 1999 eruption of Shishaldin Volcano, Alaska
On 4 March 1999, a shallow ML 5.2 earthquake occurred beneath Unimak Island in the Aleutian Arc. This earthquake was located 10-15 km west of Shishaldin Volcano, a large, frequently active basaltic-andesite stratovolcano. A Strombolian eruption began at Shishaldin roughly 1 month after the mainshock, culminating in a large explosive eruption on 19 April. We address the question of...
Authors
Seth C. Moran, S.D. Stihler, J.A. Power
Magmatic inflation at a dormant stratovolcano: 1996-1998 activity at Mount Peulik volcano, Alaska, revealed by satellite radar interferometry
A series of ERS radar interferograms that collectively span the time interval from July 1992 to August 2000 reveal that a presumed magma body located 6.6 ??? 0.5 km beneath the southwest flank of the Mount Peulik volcano inflated 0.051 ??? 0.005 km3 between October 1996 and September 1998. Peulik has been active only twice during historical time, in 1814 and 1852, and the volcano was...
Authors
Zhong Lu, Charles W. Wicks, Daniel Dzurisin, John A. Power, Seth C. Moran, Wayne R. Thatcher
Seismic response of the katmai volcanoes to the 6 December 1999 magnitude 7.0 Karluk Lake earthquake, Alaska
A sudden increase in earthquake activity was observed beneath volcanoes in the Katmai area on the Alaska Peninsula immediately following the 6 December 1999 magnitude (Mw) 7.0 Karluk Lake earthquake beneath southern Kodiak Island, Alaska. The observed increase in earthquake activity consisted of small (ML 1.3), shallow (Z 5.0 km) events. These earthquakes were located beneath Mount...
Authors
J.A. Power, Seth C. Moran, S.R. McNutt, S.D. Stihler, J.J. Sanchez
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1, 1994 through December 31, 1999
The Alaska Volcano Observatory (AVO), a cooperative program of the U.S. Geological Survey, the Geophysical Institute of the University of Alaska - Fairbanks, and the Alaska Division of Geological and Geophysical Surveys, has maintained a seismic monitoring program at potentially active volcanoes in Alaska since 1988 (Power and others, 1993; Jolly and others, 1996). The primary objectives...
Authors
Arthur D. Jolly, Scott D. Stihler, John A. Power, John C. Lahr, John F. Paskievitch, Guy Tytgat, Steve Estes, Andrew Lockhart, Seth C. Moran, Stephen R. McNutt, William R. Hammond
A model for the magmatic-hydrothermal system at Mount Rainier, Washington, from seismic and geochemical observations
Mount Rainier is one of the most seismically active volcanoes in the Cascade Range, with an average of one to two high-frequency volcano-tectonic (or VT) earthquakes occurring directly beneath the summit in a given month. Despite this level of seismicity, little is known about its cause. The VT earthquakes occur at a steady rate in several clusters below the inferred base of the...
Authors
Seth C. Moran, D. R. Zimbelman, S. D. Malone
P wave crustal velocity structure in the greater Mount Rainier area from local earthquake tomography
We present results from a local earthquake tomographic imaging experiment in the greater Mount Rainier area. We inverted P wave arrival times from local earthquakes recorded at permanent and temporary Pacific Northwest Seismograph Network seismographs between 1980 and 1996. We used a method similar to that described by Lees and Crosson [1989], modified to incorporate the parameter...
Authors
Seth C. Moran, J.M. Lees, S. D. Malone