Issues

OPINION
Integrate Urban‐Scale Seismic Hazard Analyses with the U.S. National Seismic Hazard Model
NEWS AND NOTES
SSA News and Notes
FOCUS SECTION
Preface to the Focus Section on Nonexplosive Source Monitoring and Imaging
Airgun Excitation Experiments at Different Placement Depths in the Qilian Mountain of Gansu Province, China
Seismic Signature of an Untuned Large‐Volume Airgun Array Fired in a Water Reservoir
3D Seismic Refraction Travel‐Time Tomography beneath the Middle‐Lower Yangtze River Region
Shallow Crustal Structure of the Middle‐Lower Yangtze River Region in Eastern China from Surface‐Wave Tomography of a Large Volume Airgun‐Shot Experiment
Temporal Variation of Seismic‐Wave Velocity Associated with Groundwater Level Observed by a Downhole Airgun near the Xiaojiang Fault Zone
Using Supervised Machine Learning to Improve Active Source Signal Retrieval
ARTICLES
Source Parameter Studies on the 8 January 2017 6.1 Resolute, Nunavut, Canada, Earthquake
Single‐Frequency Instantaneous GNSS Velocities Resolve Dynamic Ground Motion of the 2016 7.1 Iniskin, Alaska, Earthquake
2018 One‐Year Seismic Hazard Forecast for the Central and Eastern United States from Induced and Natural Earthquakes
The Relationship between and : A Review and Application to Induced Seismicity in the Groningen Gas Field, The Netherlands
Toward the Origin of Long‐Period Long‐Duration Seismic Events during Hydraulic Fracturing Treatment: A Case Study in the Shale Play of Sichuan Basin, China
Revision of Metadata Sensitivities at IRIS/IDA Stations
Homogeneous Estimation of Moment Magnitude for Small‐to‐Moderate Magnitude Earthquakes Located near the Border between Japan and Taiwan
Improving Location of Offshore Earthquakes in Earthquake Early Warning System
Seismic Signature of the Azure Window Collapse, Gozo, Central Mediterranean
How Likely Does an Aftershock Sequence Conform to a Single Omori Law Behavior?
ELECTRONIC SEISMOLOGIST
Parallel Image Registration Implementations for GMTSAR Package
Fitting Waveform Envelopes to Derive Focal Mechanisms of Moderate Earthquakes
A Suite of Exercises for Verifying Dynamic Earthquake Rupture Codes
COMMUNICATING SCIENCE
Would You Like People to Listen to You? Be More Likable!
EDUQUAKES
A Python Library for Teaching Computation to Seismology Students
EASTERN SECTION
Ground‐Motion Models for Very‐Hard‐Rock Sites in Eastern North America: An Update
Evaluating the 2016 One‐Year Seismic Hazard Model for the Central and Eastern United States Using Instrumental Ground‐Motion Data
A Geophysical and Field Survey for the Source Region of the 1638 New Hampshire Earthquake
The 1755 Cape Ann Earthquake Recorded in Lake Sediments of Eastern New England: An Interdisciplinary Paleoseismic Approach
MEETING CALENDAR
Meeting Calendar
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Cover Image
Cover Image
Front: Scientists in China have made tremendous efforts to use large-volume airguns to create a repeatable and powerful source for imaging subsurface structures and monitoring temporal changes of seismic velocities. The two top panels show similar seismic profiles, one from a chemical explosion and another from stacked airgun shots. The photo was taken immediately following an airgun shot in Yunnan province, Southwest China, and shows air bubbles that have risen to the surface. These results and more are described in detail in the six articles included in the SRL Focus Section on Nonexplosive Source Monitoring and Imaging (this issue). Photo by Baoshan Wang.
Back: Receiver velocities derived from single-frequency high-rate (≥1 Hz) carrier-phase observations can be used to turn GNSS instruments into velocity meters of unlimited dynamic range, potentially in real time, enabling instantaneous investigation of large, rapid motions. Grapenthin et al. (this issue) reports on the application of this technique to the 125-km-deep 2016 Mw 7.1 Iniskin, Alaska, earthquake, which created only small permanent surface offsets but much larger dynamic displacements.
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