Tide Gauges Capture Tremor Episodes in Cascadia

15 February 2019–Hourly water level records collected from tide gauges can be used to measure land uplift caused by episodic tremor and slip of slow earthquakes in the Cascadia Subduction Zone, according to a new report in the Bulletin of the Seismological Society of America. Global Positioning System (GPS) data … Continue Reading »

Toppled Train Offers Insight into 1906 Earthquake

By mathematically modeling the movements of a locomotive that toppled from the tracks north of San Francisco during the city’s infamous 1906 earthquake, researchers have calculated a lower limit on the earthquake ground motion at the spot of the tipped train. Their report in the journal Seismological Research Letters concludes … Continue Reading »

2019 SSA Board of Directors Election Results

The Seismological Society of America held its Board of Directors election on Friday, 4 January 2019. The following nominees for Director were elected to a three-year term beginning in April 2019 at the SSA Annual Meeting in Seattle: Heather DeShon, Associate Professor, Southern Methodist University Heather DeShon’s principal fields of … Continue Reading »

Yousef Bozorgnia Selected as 2019 Bruce Bolt Medal Recipient

The Consortium of Strong Motion Observation Systems (COSMOS), Earthquake Engineering Research Institute (EERI) and SSA have selected Yousef Bozorgnia as the 2019 recipient of the Bruce Bolt Medal. Bozorgnia, a professor at the University of California, Los Angeles in both the Department of Civil and Environmental Engineering and the John … Continue Reading »

SRL Focus Section Investigates 2018 Hualien Earthquake Sequence

28 December 2018–A low-cost earthquake early warning system provided a map of expected ground shaking around the epicenter of February’s magnitude 6.4 Hualien earthquake within two minutes of the mainshock’s start, according to a new study by seismologists at the National Taiwan University, which deployed the system. The predicted shake … Continue Reading »

Annual Meeting Travel Grant Recipients Announced

SSA announced 21 student and international members will receive travel grants to attend the Annual Meeting in Seattle, to be held 23–26 April 2019. These travel grants are made possible by member contributions to the Kanamori Fund, the General Fund and the Student Travel Fund. Grant recipients receive complimentary conference registration and a cash stipend for transportation, food and lodging. The 21 recipients of … Continue Reading »

Allison Bent Named Editor-in-Chief of SRL

SAN FRANCISCO (3 December 2018) – The Seismological Society of America (SSA) announced today the appointment of Allison Bent, a research seismologist with Natural Resources Canada, as editor-in-chief of Seismological Research Letters (SRL). Accessible by all SSA members and available in more than 1,300 academic, government and corporate institutions worldwide, … Continue Reading »

Explosion, Collapse, Earthquakes: Analysis of North Korea’s 2017 Nuclear Test

26 September 2018–The epicenter of the 3 September 2017 nuclear test explosion in North Korea occurred about 3.6 kilometers northwest of the country’s first nuclear test in October 2006, according to a new high-precision analysis of the explosion and its aftermath. The study published in Seismological Research Letters by Lian-Feng Zhao … Continue Reading »

Seasonal Reservoir Filling in India Deforms Rock, May Trigger Earthquakes

25 September 2018–The seasonal filling and emptying of reservoirs in India can cause measurable deformation of the surrounding rock, reducing the strength of nearby faults and potentially triggering earthquakes, according to two new papers published in the Bulletin of the Seismological Society of America. Researchers in India used global positioning … Continue Reading »

SSA Board of Directors Election 2019

SSA announces the candidates for the 2019 election to add four members to the Board of Directors. The nominating committee, chaired by Jim Mori, confirmed a slate of six individuals to run for office. The committee included: Jim Mori (Kyoto University) Rachel Abercrombie (Boston University) Gail Atkinson (Western University) Ken … Continue Reading »

Urban Geophone Array Offers New Look at Los Angeles Basin

1 August 2018–Using an array of coffee-can sized geophones deployed for about a month in backyards, golf courses and public parks, researchers collected enough data to allow them to map the depth and shape of the San Gabriel and San Bernardino sedimentary basins of Los Angeles, California. Seismologists think these … Continue Reading »

SSA Announces 2018 Award Recipients

reid medal in box; Credit: SSA

14 June 2018–SSA is pleased to announce the recipients of several of the Society’s awards for 2018. The Harry Fielding Reid Medal, the Charles F. Richter Early Career Award and the Frank Press Public Service Award are among the highest honors conferred by the Society. The Reid Medal recipient is David M. … Continue Reading »

How Often Do Cascadia’s Megaquakes Occur?

16 May 2018–Devastating magnitude 8.0 to 9.0 megathrust earthquakes and accompanying tsunamis appear to have hit the U.S. Pacific Northwest and Southwest Canada about every 500 years on average. But some scientists think the recurrence interval between some of these large earthquakes may be shorter—along the lines of every 300 … Continue Reading »

How Big Can a Tsunami Be in the Caribbean?

16 May 2018–The 2004 Indian Ocean tsunami has researchers reevaluating whether a magnitude 9.0 megathrust earthquake and resulting tsunami might also be a likely risk for the Caribbean region, seismologists reported at the SSA 2018 Annual Meeting. “Before 2004, we thought an earthquake of about 8.0 was about right for … Continue Reading »

Monitoring Lava Lake Levels in Congo Volcano

15 May 2018–Nyiragongo in the Democratic Republic of the Congo is among the world’s most active volcanoes, with a persistent lava lake as one of its defining features. In a talk at the 2018 SSA Annual Meeting, Adrien Oth of the European Center for Geodynamics and Seismology discussed how he … Continue Reading »

At Work: Vedran Lekic

When an earthquake occurs, seismic waves travel throughout the Earth. As they encounter material of different rigidity, however, they slow down or change direction. By mapping out where this happens, scientists can create images of the structures and processes within the deep Earth – a technique known as global tomography. … Continue Reading »

Update for U.S. Government Employees

In response to the U.S. Government shutdown, SSA has taken several steps in the hope that government employees will be able to fully participate in the SSA Annual Meeting.  Please check here for future updates.

25 January 2019: The Co-Chairs have nearly completed the process of scheduling all oral presentations.  Here’s what to expect next if you are a government employee affected by the shutdown. … Continue Reading »

At Work: Rémy Bossu

On 30 November 2018, users of the LastQuake app received notifications on their phones and computers—an M7.0 earthquake had just struck Alaska. Upon clicking the notification, they were taken to a page with maps, data and comments from those who felt the quake. Within seconds, they knew exactly where and … Continue Reading »