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Volume 91, Number 3
May 2020
ISSN 0895-0695
EISSN 1938-2057
Opinion
Rescuing Legacy Seismic Data FAIR’ly
Lorraine J. Hwang; Tim Ahern; Cynthia J. Ebinger; William L. Ellsworth; Garrett G. Euler; Emile A. Okal; Paul G. Okubo; William R. Walter
Seismological Research Letters March 11, 2020, Vol.91, 1339-1340. doi:https://doi.org/10.1785/0220200027
In Memoriam
Paul A. Spudich (1950–2019)
Seismological Research Letters March 04, 2020, Vol.91, 1341-1342. doi:https://doi.org/10.1785/0220200024
Emerging Topics
A Plan for a Long‐Term, Automated, Broadband Seismic Monitoring Network on the Global Seafloor
Monica D. Kohler; Katrin Hafner; Jeffrey Park; Jessica C. E. Irving; Jackie Caplan‐Auerbach; John Collins; Jonathan Berger; Anne M. Tréhu; Barbara Romanowicz; Robert L. Woodward
Seismological Research Letters April 15, 2020, Vol.91, 1343-1355. doi:https://doi.org/10.1785/0220190123
Focus Section
Preface to the Focus Section on Historical Seismograms
Seismological Research Letters April 15, 2020, Vol.91, 1356-1358. doi:https://doi.org/10.1785/0220200112
Calibration Analysis and Noise Estimates of WWSSN Station ALQ (Albuquerque, New Mexico)
Seismological Research Letters November 06, 2019, Vol.91, 1359-1366. doi:https://doi.org/10.1785/0220190201
Analysis of Intraslab Predigital Earthquakes of the South‐Central Alaska Region
Seismological Research Letters January 02, 2020, Vol.91, 1367-1376. doi:https://doi.org/10.1785/0220190288
Did Oldham Discover the Core After All? Handling Imprecise Historical Data with Hierarchical Bayesian Model Selection Methods
Seismological Research Letters January 15, 2020, Vol.91, 1377-1383. doi:https://doi.org/10.1785/0220190266
Analog Seismogram Archives at the Earthquake Research Institute, the University of Tokyo
Seismological Research Letters January 15, 2020, Vol.91, 1384-1393. doi:https://doi.org/10.1785/0220190281
Conservation and Utilization of Historical Seismograms from Early Stage (A.D. 1904–1948), Mainland China
Seismological Research Letters February 05, 2020, Vol.91, 1394-1402. doi:https://doi.org/10.1785/0220190268
Data Retrieval System of JMA Analog Seismograms in the Headquarters for Earthquake Research Promotion of the Japanese Government
Mitsuko Furumura; Koji Iwasa; Yasunori Suzuki; Tomotsugu Demachi; Takeo Ishibe; Ritsuko S. Matsu’ura
Seismological Research Letters January 29, 2020, Vol.91, 1403-1412. doi:https://doi.org/10.1785/0220190303
Finding, Organizing, and Preserving Legacy Nuclear Test Monitoring Data—Examples from the Livermore Nevada Network
Seismological Research Letters February 12, 2020, Vol.91, 1413-1416. doi:https://doi.org/10.1785/0220190286
Time Marks and Clock Corrections: A Century of Seismological Timekeeping
Seismological Research Letters January 15, 2020, Vol.91, 1417-1429. doi:https://doi.org/10.1785/0220190284
Recovering Analog‐Tape Seismograms from the 1980 Mount St. Helens Pre‐Eruption Period
Seismological Research Letters January 29, 2020, Vol.91, 1430-1440. doi:https://doi.org/10.1785/0220190327
Digitization of the Carnegie Analog Broadband Instruments Tape Records (1965–1996)
Steven Golden; Lara S. Wagner; Brian Schleigh; Daniela Power; Diana C. Roman; Selwyn I. Sacks; Helen Janiszewski
Seismological Research Letters February 26, 2020, Vol.91, 1441-1451. doi:https://doi.org/10.1785/0220190334
The Achievement of Archiving Analog Seismograms in Japanese Institutes for 15 Yr
Ritsuko S. Matsu’ura; Norihito Umino; Yoshiaki Tamura; Yoshihisa Iio; Minoru Kasahara; Takahiro Ohkura
Seismological Research Letters February 19, 2020, Vol.91, 1452-1458. doi:https://doi.org/10.1785/0220190301
A Database of Digitized and Analog Seismograms of Historical Earthquakes in Japan
Satoko Murotani; Kenji Satake; Hiroshi Tsuruoka; Hiroe Miyake; Toshiaki Sato; Tetsuo Hashimoto; Hiroo Kanamori
Seismological Research Letters February 19, 2020, Vol.91, 1459-1468. doi:https://doi.org/10.1785/0220190287
Two Earthquake Sequences Nearly a Century Apart Reveal a Conjugate Seismogenic System in Central Taiwan
Seismological Research Letters March 04, 2020, Vol.91, 1469-1481. doi:https://doi.org/10.1785/0220190335
Preservation and Reuse of Historical Seismic Data in Mexico: SISMOMex and the Online “National Seismogram Library”
Xyoli Pérez‐Campos; Saul Armendáriz‐Sánchez; Víctor H. Espíndola; Minerva Castro‐Escamilla; Jesus Perez; Luis Manuel Casiano; Ivan Rodriguez Rasilla; Caridad Cárdenas Monroy; Arturo Cárdenas
Seismological Research Letters February 26, 2020, Vol.91, 1482-1487. doi:https://doi.org/10.1785/0220190340
Recovery and Calibration of Legacy Underground Nuclear Test Seismic Data from the Leo Brady Seismic Network
Seismological Research Letters April 08, 2020, Vol.91, 1488-1499. doi:https://doi.org/10.1785/0220190341
Probabilistic Seismic Hazard Assessment Using Legacy Data in Georgia
Tuna Onur; Rengin Gok; Tea Godoladze; Irakli Gunia; Giorgi Boichenko; Albert Buzaladze; Nino Tumanova; Manana Dzmanashvili; Lasha Sukhishvili; Zurab Javakishvili; Eric Cowgill; István Bondár; Gurban Yetirmishli
Seismological Research Letters April 15, 2020, Vol.91, 1500-1517. doi:https://doi.org/10.1785/0220190331
On the Extraction of Microseismic Ground Motion from Analog Seismograms for the Validation of Ocean‐Climate Models
Seismological Research Letters April 01, 2020, Vol.91, 1518-1530. doi:https://doi.org/10.1785/0220190276
Challenges and Opportunities in Turning Large U.S. Archives of Analog Seismograms into a Modern Usable Resource
Seismological Research Letters April 08, 2020, Vol.91, 1531-1541. doi:https://doi.org/10.1785/0220200053
Articles
Near‐Field Ground Motions from the July 2019 Ridgecrest, California, Earthquake Sequence
Susan E. Hough; Eric Thompson; Grace A. Parker; Robert W. Graves; Kenneth W. Hudnut; Jason Patton; Timothy Dawson; Tyler Ladinsky; Michael Oskin; Krittanon Sirorattanakul; Kelly Blake; Annemarie Baltay; Elizabeth Cochran
Seismological Research Letters February 26, 2020, Vol.91, 1542-1555. doi:https://doi.org/10.1785/0220190279
Automatic Inversion of Rupture Processes of the Foreshock and Mainshock and Correlation of the Seismicity during the 2019 Ridgecrest Earthquake Sequence
Yijun Zhang; Xujun Zheng; Qiang Chen; Xianwen Liu; Xiaomei Huang; Yinghui Yang; Qian Xu; Jingjing Zhao
Seismological Research Letters March 04, 2020, Vol.91, 1556-1566. doi:https://doi.org/10.1785/0220190343
Operational Earthquake Forecasting during the 2019 Ridgecrest, California, Earthquake Sequence with the UCERF3‐ETAS Model
Seismological Research Letters March 04, 2020, Vol.91, 1567-1578. doi:https://doi.org/10.1785/0220190294
Watts Bar Nuclear Power Plant Strong‐Motion Records of the 12 December 2018 M 4.4 Decatur, Tennessee, Earthquake
Seismological Research Letters April 08, 2020, Vol.91, 1579-1592. doi:https://doi.org/10.1785/0220190387
Seismotectonics of the 2017–2018 Songyuan Earthquake Sequence, Northeastern China: Passive Bookshelf Faulting and Block Rotation in the Songliao Basin
Seismological Research Letters March 11, 2020, Vol.91, 1593-1605. doi:https://doi.org/10.1785/0220190251
Significance of Nonplanar Rupture of the Mainshock and Optimal Faulting in Forecasting Aftershocks of the 2015 7.8 Gorkha Earthquake
Seismological Research Letters April 08, 2020, Vol.91, 1606-1616. doi:https://doi.org/10.1785/0220190254
The 21 May 1960 8.1 Concepción Earthquake: A Deep Megathrust Foreshock That Started the 1960 Central‐South Chilean Seismic Sequence
Seismological Research Letters March 11, 2020, Vol.91, 1617-1627. doi:https://doi.org/10.1785/0220190143
Evaluation of Earthquake Magnitude Estimation and Event Detection Thresholds for Real‐Time GNSS Networks: Examples from Recent Events Captured by the Network of the Americas
Seismological Research Letters March 04, 2020, Vol.91, 1628-1645. doi:https://doi.org/10.1785/0220190269
High‐Accuracy Discrimination of Blasts and Earthquakes Using Neural Networks With Multiwindow Spectral Data
Seismological Research Letters March 11, 2020, Vol.91, 1646-1659. doi:https://doi.org/10.1785/0220190084
Sensor Orientation of Iranian Broadband Seismic Stations from P‐Wave Particle Motion
Seismological Research Letters April 01, 2020, Vol.91, 1660-1671. doi:https://doi.org/10.1785/0220200019
Pre‐Sinkhole Seismicity at the Napoleonville Salt Dome: Implications for Local Seismic Monitoring of Underground Caverns
Seismological Research Letters March 25, 2020, Vol.91, 1672-1678. doi:https://doi.org/10.1785/0220190224
Spatiotemporal Seismotectonic Implications for the Izu–Bonin–Mariana Subduction Zone from ‐Values
Seismological Research Letters March 25, 2020, Vol.91, 1679-1693. doi:https://doi.org/10.1785/0220190356
How Processing Methodologies Can Distort and Bias Power Spectral Density Estimates of Seismic Background Noise
Seismological Research Letters April 08, 2020, Vol.91, 1694-1706. doi:https://doi.org/10.1785/0220190212
Mapping Seismic Tonal Noise in the Contiguous United States
Seismological Research Letters March 18, 2020, Vol.91, 1707-1716. doi:https://doi.org/10.1785/0220190355
Evaluating Uncertainties of Phase Velocity Measurements from Cross‐Correlations of Ambient Seismic Noise
Seismological Research Letters March 04, 2020, Vol.91, 1717-1729. doi:https://doi.org/10.1785/0220190308
Observation by Means of An Underground Ring Laser Gyroscope of Love Waves Generated in the Mediterranean Sea: Source Direction and Comparison with Models
Seismological Research Letters March 18, 2020, Vol.91, 1730-1737. doi:https://doi.org/10.1785/0220190362
Using Deep Learning to Derive Shear‐Wave Velocity Models from Surface‐Wave Dispersion Data
Seismological Research Letters February 19, 2020, Vol.91, 1738-1751. doi:https://doi.org/10.1785/0220190222
Improved Parametric Models for Explosion Pressure Signals Derived From Large Datasets
Seismological Research Letters March 04, 2020, Vol.91, 1752-1762. doi:https://doi.org/10.1785/0220190278
Earthquake Early Warning ShakeAlert 2.0: Public Rollout
Monica D. Kohler; Deborah E. Smith; Jennifer Andrews; Angela I. Chung; Renate Hartog; Ivan Henson; Douglas D. Given; Robert de Groot; Stephen Guiwits
Seismological Research Letters April 08, 2020, Vol.91, 1763-1775. doi:https://doi.org/10.1785/0220190245
Evidence for Holocene Activity on the Jiali Fault, an Active Block Boundary in the Southeastern Tibetan Plateau
Seismological Research Letters April 01, 2020, Vol.91, 1776-1780. doi:https://doi.org/10.1785/0220190371
Crustal Characteristics in the Subduction Zone of Mexico: Implication of the Tectonostratigraphic Terranes on Slab Tearing
Seismological Research Letters February 26, 2020, Vol.91, 1781-1793. doi:https://doi.org/10.1785/0220190117
Comparison of Single‐Trace and Multiple‐Trace Polarity Determination for Surface Microseismic Data Using Deep Learning
Seismological Research Letters March 04, 2020, Vol.91, 1794-1803. doi:https://doi.org/10.1785/0220190353
Seismology in the Cloud: A New Streaming Workflow
Seismological Research Letters March 18, 2020, Vol.91, 1804-1812. doi:https://doi.org/10.1785/0220190357
Sp Receiver‐Function Images of African and Arabian Lithosphere: Survey of Newly Available Broadband Data
Seismological Research Letters February 26, 2020, Vol.91, 1813-1819. doi:https://doi.org/10.1785/0220190311
Inversion of Source Mechanisms for Single‐Force Events Using Broadband Waveforms
Seismological Research Letters April 01, 2020, Vol.91, 1820-1830. doi:https://doi.org/10.1785/0220190349
Eastern Section
Natural Seismicity in and around the Rome Trough, Eastern Kentucky, from a Temporary Seismic Network
N. Seth Carpenter; Andrew S. Holcomb; Edward W. Woolery; Zhenming Wang; John B. Hickman; Steven L. Roche
Seismological Research Letters March 18, 2020, Vol.91, 1831-1845. doi:https://doi.org/10.1785/0220190015
Electronic Seismologist
Seismological Observatory Software: 30 Yr of SEISAN
Seismological Research Letters March 18, 2020, Vol.91, 1846-1852. doi:https://doi.org/10.1785/0220190313
NoisePy: A New High‐Performance Python Tool for Ambient‐Noise Seismology
Seismological Research Letters April 01, 2020, Vol.91, 1853-1866. doi:https://doi.org/10.1785/0220190364
SHAPE: A MATLAB Software Package for Time‐Dependent Seismic Hazard Analysis
Seismological Research Letters April 08, 2020, Vol.91, 1867-1877. doi:https://doi.org/10.1785/0220190319
Geopsy: A User‐Friendly Open‐Source Tool Set for Ambient Vibration Processing
Marc Wathelet; Jean‐Luc Chatelain; Cécile Cornou; Giuseppe Di Giulio; Bertrand Guillier; Matthias Ohrnberger; Alexandros Savvaidis
Seismological Research Letters April 08, 2020, Vol.91, 1878-1889. doi:https://doi.org/10.1785/0220190360
Historical Seismologist
The Damaging Earthquake of 9 October 859 in Kairouan (Tunisia): Evidence from Historical and Archeoseismological Investigations
Seismological Research Letters March 11, 2020, Vol.91, 1890-1900. doi:https://doi.org/10.1785/0220190258
Data Mine
The Deployment of the Seismometer to Investigate Ice and Ocean Structure (SIIOS) on Gulkana Glacier, Alaska
Angela G. Marusiak; Nicholas C. Schmerr; Daniella N. DellaGiustina; Erin C. Pettit; Peter H. Dahl; Brad Avenson; S. Hop Bailey; Veronica J. Bray; Natalie Wagner; Chris G. Carr; Renee C. Weber
Seismological Research Letters March 18, 2020, Vol.91, 1901-1914. doi:https://doi.org/10.1785/0220190328
A Report on Broadband Seismological Experiment in the Jammu and Kashmir Himalaya (JAKSNET)
Swati Sharma; Supriyo Mitra; Shubham Sharma; Keith Priestley; Sunil K. Wanchoo; Debarchan Powali; Liyaqet Ali
Seismological Research Letters March 18, 2020, Vol.91, 1915-1926. doi:https://doi.org/10.1785/0220190389
Erratum
Erratum to Analysis of the 2014 7.3 Papanoa (Mexico) Earthquake: Implications for Seismic Hazard Assessment
Seismological Research Letters April 08, 2020, Vol.91, 1927. doi:https://doi.org/10.1785/0220200098
SSA News and Notes
SSA News and Notes
Seismological Research Letters May 01, 2020, Vol.91, 1928. doi:https://doi.org/10.1785/0220200099
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Cover Image
Cover Image
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The medieval Prague (Czech Republic) Astronomical Clock serves as a reminder that accurate timing is an integral part of seismology, a topic highlighted in an article by Agnew (this issue) covering the history and importance of timekeeping in seismology. Within the Historical Seismogram focus section in this issue are many success stories involving the preservation and analysis of analog seismograms but many more seismograms are in danger of being lost due to natural deterioration and pressures to reduce storage space. Time is of the essence in preserving this valuable data set.
Image credit: iStock.com/Bill_Vorasate
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