Jeffrey Joseph McGuire
Jeff McGuire is a research geophysicist in the Earthquake Hazards Program.
Science and Products
Filter Total Items: 32
Waveform signatures of earthquakes located close to the subducted Gorda Plate interface Waveform signatures of earthquakes located close to the subducted Gorda Plate interface
Complex seismic velocity structure near the earthquake source can affect rupture dynamics and strongly modify the seismic waveforms recorded near the fault. Fault‐zone waves are commonly observed in continental crustal settings but are less clear in subduction zones due to the spatial separation between seismic stations and the plate boundary fault. We observed anomalously long duration...
Authors
Jianhua Gong, Jeffrey J. McGuire
Testing the ShakeAlert earthquake early warning system using synthesized earthquake sequences Testing the ShakeAlert earthquake early warning system using synthesized earthquake sequences
We test the behavior of the United States (US) West Coast ShakeAlert earthquake early warning (EEW) system during temporally close earthquake pairs to understand current performance and limitations. We consider performance metrics based on source parameter and ground‐motion forecast accuracy, as well as on alerting timeliness. We generate ground‐motion times series for synthesized...
Authors
Maren Bose, Jennifer Andrews, Colin T O’Rourke, Deborah L. Kilb, Angela Lux, Julian Bunn, Jeffrey J. McGuire
Very low frequency earthquakes in between the seismogenic and tremor zones in Cascadia? Very low frequency earthquakes in between the seismogenic and tremor zones in Cascadia?
Megathrust earthquakes and their associated tsunamis cause some of the worst natural disasters. In addition to earthquakes, a wide range of slip behaviors are present at subduction zones, including slow earthquakes that span multiple orders of spatial and temporal scales. Understanding these events may shed light on the stress or strength conditions of the megathrust fault. Out of all...
Authors
Wenyuan Fan, Andrew J. Barbour, Jeffrey J. McGuire, Yihe Huang, Guoqing Lin, Elizabeth S. Cochran, Ryo Okuwaki
Earthquake early warning for estimating floor shaking levels of tall buildings Earthquake early warning for estimating floor shaking levels of tall buildings
This article investigates methods to improve earthquake early warning (EEW) predictions of shaking levels for residents of tall buildings. In the current U.S. Geological Survey ShakeAlert EEW system, regions far from an epicenter will not receive alerts due to low predicted ground‐shaking intensities. However, residents of tall buildings in those areas may still experience significant...
Authors
S. Farid Ghahari, Annemarie S. Baltay Sundstrom, Mehmet Celebi, Grace Alexandra Parker, Jeffrey J. McGuire, Ertugrul Taciroglu
Correlation of porosity variations and rheological transitions on the southern Cascadia megathrust Correlation of porosity variations and rheological transitions on the southern Cascadia megathrust
The unknown onshore extent of megathrust earthquake rupture in the Cascadia subduction zone represents a key uncertainty in earthquake hazard for the Pacific Northwest that is governed by the physical state and mechanical properties of the plate interface. The Cascadia plate interface is segmented into an interseismically locked zone located primarily offshore that is expected to rupture...
Authors
Hao Guo, Jeffrey J. McGuire, Haijiang Zhang
Expected warning times from the ShakeAlert earthquake early warning system for earthquakes in the Pacific Northwest Expected warning times from the ShakeAlert earthquake early warning system for earthquakes in the Pacific Northwest
The ShakeAlert® earthquake early warning system has been live since October 2019 for the testing of public alerting to mobile devices in California and will soon begin testing this modality in Oregon and Washington. The Pacific Northwest presents new challenges and opportunities for ShakeAlert owing to the different types of earthquakes that occur in the Cascadia subduction zone. Many...
Authors
Jeffrey J. McGuire, Deborah E. Smith, Arthur D. Frankel, Erin A. Wirth, Sara K. McBride, Robert M. de Groot
Science and Products
Filter Total Items: 32
Waveform signatures of earthquakes located close to the subducted Gorda Plate interface Waveform signatures of earthquakes located close to the subducted Gorda Plate interface
Complex seismic velocity structure near the earthquake source can affect rupture dynamics and strongly modify the seismic waveforms recorded near the fault. Fault‐zone waves are commonly observed in continental crustal settings but are less clear in subduction zones due to the spatial separation between seismic stations and the plate boundary fault. We observed anomalously long duration...
Authors
Jianhua Gong, Jeffrey J. McGuire
Testing the ShakeAlert earthquake early warning system using synthesized earthquake sequences Testing the ShakeAlert earthquake early warning system using synthesized earthquake sequences
We test the behavior of the United States (US) West Coast ShakeAlert earthquake early warning (EEW) system during temporally close earthquake pairs to understand current performance and limitations. We consider performance metrics based on source parameter and ground‐motion forecast accuracy, as well as on alerting timeliness. We generate ground‐motion times series for synthesized...
Authors
Maren Bose, Jennifer Andrews, Colin T O’Rourke, Deborah L. Kilb, Angela Lux, Julian Bunn, Jeffrey J. McGuire
Very low frequency earthquakes in between the seismogenic and tremor zones in Cascadia? Very low frequency earthquakes in between the seismogenic and tremor zones in Cascadia?
Megathrust earthquakes and their associated tsunamis cause some of the worst natural disasters. In addition to earthquakes, a wide range of slip behaviors are present at subduction zones, including slow earthquakes that span multiple orders of spatial and temporal scales. Understanding these events may shed light on the stress or strength conditions of the megathrust fault. Out of all...
Authors
Wenyuan Fan, Andrew J. Barbour, Jeffrey J. McGuire, Yihe Huang, Guoqing Lin, Elizabeth S. Cochran, Ryo Okuwaki
Earthquake early warning for estimating floor shaking levels of tall buildings Earthquake early warning for estimating floor shaking levels of tall buildings
This article investigates methods to improve earthquake early warning (EEW) predictions of shaking levels for residents of tall buildings. In the current U.S. Geological Survey ShakeAlert EEW system, regions far from an epicenter will not receive alerts due to low predicted ground‐shaking intensities. However, residents of tall buildings in those areas may still experience significant...
Authors
S. Farid Ghahari, Annemarie S. Baltay Sundstrom, Mehmet Celebi, Grace Alexandra Parker, Jeffrey J. McGuire, Ertugrul Taciroglu
Correlation of porosity variations and rheological transitions on the southern Cascadia megathrust Correlation of porosity variations and rheological transitions on the southern Cascadia megathrust
The unknown onshore extent of megathrust earthquake rupture in the Cascadia subduction zone represents a key uncertainty in earthquake hazard for the Pacific Northwest that is governed by the physical state and mechanical properties of the plate interface. The Cascadia plate interface is segmented into an interseismically locked zone located primarily offshore that is expected to rupture...
Authors
Hao Guo, Jeffrey J. McGuire, Haijiang Zhang
Expected warning times from the ShakeAlert earthquake early warning system for earthquakes in the Pacific Northwest Expected warning times from the ShakeAlert earthquake early warning system for earthquakes in the Pacific Northwest
The ShakeAlert® earthquake early warning system has been live since October 2019 for the testing of public alerting to mobile devices in California and will soon begin testing this modality in Oregon and Washington. The Pacific Northwest presents new challenges and opportunities for ShakeAlert owing to the different types of earthquakes that occur in the Cascadia subduction zone. Many...
Authors
Jeffrey J. McGuire, Deborah E. Smith, Arthur D. Frankel, Erin A. Wirth, Sara K. McBride, Robert M. de Groot