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, 2003 Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2003
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. The primary objectives of this program are the near real time seismic...
Authors
James P. Dixon, Scott D. Stihler, John A. Power, Guy Tytgat, Seth C. Moran, John J. Sanchez, Stephen R. McNutt, Steve Estes, John Paskievitch
Observations of deep long-period (DLP) seismic events beneath Aleutian arc volcanoes; 1989-2002 Observations of deep long-period (DLP) seismic events beneath Aleutian arc volcanoes; 1989-2002
Between October 12, 1989 and December 31, 2002, the Alaska Volcano Observatory (AVO) located 162 deep long-period (DLP) events beneath 11 volcanic centers in the Aleutian arc. These events generally occur at mid- to lower-crustal depths (10-45 km) and are characterized by emergent phases, extended codas, and a strong spectral peak between 1.0 and 3.0 Hz. Observed wave velocities and...
Authors
J.A. Power, S.D. Stihler, R.A. White, S.C. Moran
Earthquake triggering at Alaskan volcanoes following the 3 November 2002 Denali fault earthquake Earthquake triggering at Alaskan volcanoes following the 3 November 2002 Denali fault earthquake
The 3 November 2002 Mw 7.9 Denali fault earthquake provided an excellent opportunity to investigate triggered earthquakes at Alaskan volcanoes. The Alaska Volcano Observatory operates short-period seismic networks on 24 historically active volcanoes in Alaska, 247-2159 km distant from the mainshock epicenter. We searched for evidence of triggered seismicity by examining the unfiltered...
Authors
S.C. Moran, J.A. Power, S.D. Stihler, J.J. Sanchez, J. Caplan-Auerbach
Temporal and spatial variation of local stress fields before and after the 1992 eruptions of Crater Peak vent, Mount Spurr volcano, Alaska Temporal and spatial variation of local stress fields before and after the 1992 eruptions of Crater Peak vent, Mount Spurr volcano, Alaska
We searched for changes in local stress-field orientation at Mount Spurr volcano, Alaska, between August 1991 and December 2001. This study focuses on the stress-field orientation beneath Crater Peak vent, the site of three eruptions in 1992, and beneath the summit of Mount Spurr. Local stress tensors were calculated by inverting subsets of 140 fault-plane solutions for earthquakes...
Authors
D.C. Roman, S.C. Moran, J.A. Power, K. V. Cashman
Seismic monitoring at Cascade volcanic centers, 2004 — Status and recommendations Seismic monitoring at Cascade volcanic centers, 2004 — Status and recommendations
The purpose of this report is to assess the current (May, 2004) status of seismic monitoring networks at the 13 major Cascade volcanic centers. Included in this assessment are descriptions of each network, analyses of the ability of each network to detect and to locate seismic activity, identification of specific weaknesses in each network, and a prioritized list of those networks that...
Authors
Seth C. Moran
Evidence for dike emplacement beneath Iliamna Volcano, Alaska in 1996 Evidence for dike emplacement beneath Iliamna Volcano, Alaska in 1996
Two earthquake swarms, comprising 88 and 2833 locatable events, occurred beneath Iliamna Volcano, Alaska, in May and August of 1996. Swarm earthquakes ranged in magnitude from -0.9 to 3.3. Increases in SO2 and CO2 emissions detected during the fall of 1996 were coincident with the second swarm. No other physical changes were observed in or around the volcano during this time period. No...
Authors
D.C. Roman, J.A. Power, S.C. Moran, K. V. Cashman, M.P. Doukas, C.A. Neal, T.M. Gerlach
Science and Products
Filter Total Items: 58
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2003 Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2003
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. The primary objectives of this program are the near real time seismic...
Authors
James P. Dixon, Scott D. Stihler, John A. Power, Guy Tytgat, Seth C. Moran, John J. Sanchez, Stephen R. McNutt, Steve Estes, John Paskievitch
Observations of deep long-period (DLP) seismic events beneath Aleutian arc volcanoes; 1989-2002 Observations of deep long-period (DLP) seismic events beneath Aleutian arc volcanoes; 1989-2002
Between October 12, 1989 and December 31, 2002, the Alaska Volcano Observatory (AVO) located 162 deep long-period (DLP) events beneath 11 volcanic centers in the Aleutian arc. These events generally occur at mid- to lower-crustal depths (10-45 km) and are characterized by emergent phases, extended codas, and a strong spectral peak between 1.0 and 3.0 Hz. Observed wave velocities and...
Authors
J.A. Power, S.D. Stihler, R.A. White, S.C. Moran
Earthquake triggering at Alaskan volcanoes following the 3 November 2002 Denali fault earthquake Earthquake triggering at Alaskan volcanoes following the 3 November 2002 Denali fault earthquake
The 3 November 2002 Mw 7.9 Denali fault earthquake provided an excellent opportunity to investigate triggered earthquakes at Alaskan volcanoes. The Alaska Volcano Observatory operates short-period seismic networks on 24 historically active volcanoes in Alaska, 247-2159 km distant from the mainshock epicenter. We searched for evidence of triggered seismicity by examining the unfiltered...
Authors
S.C. Moran, J.A. Power, S.D. Stihler, J.J. Sanchez, J. Caplan-Auerbach
Temporal and spatial variation of local stress fields before and after the 1992 eruptions of Crater Peak vent, Mount Spurr volcano, Alaska Temporal and spatial variation of local stress fields before and after the 1992 eruptions of Crater Peak vent, Mount Spurr volcano, Alaska
We searched for changes in local stress-field orientation at Mount Spurr volcano, Alaska, between August 1991 and December 2001. This study focuses on the stress-field orientation beneath Crater Peak vent, the site of three eruptions in 1992, and beneath the summit of Mount Spurr. Local stress tensors were calculated by inverting subsets of 140 fault-plane solutions for earthquakes...
Authors
D.C. Roman, S.C. Moran, J.A. Power, K. V. Cashman
Seismic monitoring at Cascade volcanic centers, 2004 — Status and recommendations Seismic monitoring at Cascade volcanic centers, 2004 — Status and recommendations
The purpose of this report is to assess the current (May, 2004) status of seismic monitoring networks at the 13 major Cascade volcanic centers. Included in this assessment are descriptions of each network, analyses of the ability of each network to detect and to locate seismic activity, identification of specific weaknesses in each network, and a prioritized list of those networks that...
Authors
Seth C. Moran
Evidence for dike emplacement beneath Iliamna Volcano, Alaska in 1996 Evidence for dike emplacement beneath Iliamna Volcano, Alaska in 1996
Two earthquake swarms, comprising 88 and 2833 locatable events, occurred beneath Iliamna Volcano, Alaska, in May and August of 1996. Swarm earthquakes ranged in magnitude from -0.9 to 3.3. Increases in SO2 and CO2 emissions detected during the fall of 1996 were coincident with the second swarm. No other physical changes were observed in or around the volcano during this time period. No...
Authors
D.C. Roman, J.A. Power, S.C. Moran, K. V. Cashman, M.P. Doukas, C.A. Neal, T.M. Gerlach