Thursday, April 25, 2024
03:00-04:30 PM Pacific Time
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The EERI Northern California Regional Chapter is hosting a FREE webinar on the earthquake that struck the west coast of Japan. The earthquake caused extensive damage to buildings. The earthquake struck on the Noto Peninsula in Ishikawa Prefecture.  The Japanese government estimated the total cost of damage at 18 billion dollars.  Most of the cost was attributed to damaged homes, roads, ports and other infrastructure. The Part 2 QQB deals with the damage to buildings and lifeline systems. At least 96,000 structures, including 74,000 houses, 190 public buildings and 22,000 of unspecified use, were damaged across Ishikawa Prefecture. Included were 24,000 which were partially or completely destroyed. At least 36,000 households and 19 medical facilities lost power following the earthquake and more than 110,000 households were left without water immediately after the quake.

Speakers: 

• Dr. Masahiro Kurata of the Disaster Prevention Research Institute, Kyoto University. He will present on observed building damage caused by the earthquake.
• Dr. Yusuke Ono of the Department of Civil Engineering, Tottori University. He will present on observed damage to lifeline systems.

Thursday, June 13, 2024
11:00 AM-12:30 PM Pacific Time
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Join EERI webinar series showcasing papers of interest from each new issue of Earthquake Spectra! This webinar will feature two papers from the May 2024 issue—the Editor's Choice selection "Liquefaction-induced ground and building interactions in İskenderun from the 2023 Kahramanmaraş earthquake sequence,"  and the data paper "A building imagery database for the calibration of machine learning algorithms."

Lead authors Diane Moug and Vitor Silva will present the papers and respond to questions from participants, and Spectra Editor-in-Chief Jack Baker will moderate the webinar.

Speakers: 

• Diane Moug, Assistant Professor in the Civil & Environmental Engineering department, Portland State University
• Vitor Silva, Risk Team Coordinator, Global Earthquake Model (GEM)
• Jack Baker, Spectra Editor-in-Chief (moderator)

Tuesday, June 18, 2024
12:00-01:00 PM Pacific Time 
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The EERI Northern California Regional Chapter is hosting a FREE webinar on the recent earthquake that affected the northeast United States. The earthquake struck mid-morning near Whitehouse Station, New Jersey, and was felt by over 40 million people all across the northeastern United States from Maine in the north to Washington, D.C. in the south. USGS classified the shaking as light (MMI < IV) throughout the region. The following link is to a New York City evening news summary. The New Jersey event was an intraplate earthquake, unlike those that occur in California that are near a plate boundary.  While this earthquake was relatively small, quakes of this magnitude are widely felt in the eastern United States because of the seismic wave propagation characteristics in the region.  Although New York City did not suffer significant damage (40 miles east of epicenter), the city emergency response systems were activated.

Speakers:

• Oliver Boyd, Ph.D., Research Geophysicist, U.S. Geological Survey.  He will present on the earthquake mechanism and the seismology of the east coast region.

• Yegal Shamash, PE, Chief Structural Engineer, NYC Department of Buildings.  He will present on the earthquake damage and emergency response actions.

Wednesday, August 28, 2024
1:00 - 2:00 PM Pacific Time
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Join us for the latest in this EERI webinar series showcasing papers of interest from each new issue of Earthquake Spectra! This webinar will feature two papers from the August 2024 issue—the Editor's Choice selection "Regional-Scale Fault-to-Structure Earthquake Simulations with the EQSIM Framework: Workflow Maturation and Computational Performance on GPU-accelerated Exascale Platforms," and the research paper "Seismic Design of Concrete Structures for Damage Control."

Lead authors David McCallen and Eyitayo Opabola will present the papers and respond to questions from participants, and Spectra Associate Editor Carlos Molina Hutt will moderate the webinar.

Thursday, September 5, 2024 (first session)
4:00 - 5:00 PM Pacific Time

Thursday, September 19, 2024 (second session)
4:30 - 5:30 PM Pacific Time

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Join EERI next month for a series of two webinars examining the M7.4 earthquake that struck Taiwan earlier this year. Registering once for this series at the above link will allow you to attend both webinars.

The earthquake occurred on April 3 at 7:58 am local time offshore about 11 miles southwest of Hualien City, one of the largest population centers on the east coast (pop. 99,500). The rupture occurred on a northeast–southwest-striking, moderately dipping, reverse fault within the Eurasian Plate. The focal mechanism was reverse-faulting at a 15 km (9 mi) depth. It is the strongest earthquake in Taiwan since the 1999 Chi-Chi earthquake (M7.7). At least 20 people were killed and 1,100 injured, predominantly due to landslides rather than structural collapses. About 110 buildings were destroyed, including some 1,900 houses, and 870 buildings and 75 roads were damaged. While structural damage was reported across Taiwan's eastern and northern regions, it is remarkable that full structural collapses were rare. The earthquake also caused widespread power and water outages, and railway service was partially suspended across Taiwan. Around 800 landslides occurred, and a tsunami with maximum wave heights of 100 cm (40 in) was generated.

The first webinar, on Thursday September 5, is a Quick Quake Briefing hosted by EERI's Northern California chapter. Two speakers from the National Center for Research on Earthquake Engineering (NCREE) in Taipei will join us. Dr. Yu-Chen Ou, Director of NCREE, will present on damage to buildings and other infrastructure, and Dr. Che-Min Lin, Research Fellow of NCREE, will present on the seismology and recorded strong ground motions.

The second webinar, on Thursday September 19, will focus on functional recovery. Dr. Wei-sen Li of the National Science and Technology Center for Disaster Reduction will speak about the role of disaster risk reduction and emergency response in making Taiwan prepared for this earthquake, and Maria Mohammed, S.E. of Structural Focus will report on the findings of the EERI Housner Fellows group that traveled to Taiwan in May to conduct reconnaissance and test a new functional recovery data collection tool.