Observations from the 2025 M7.7 Myanmar Earthquake: Impacts in Thailand and Engineering Implications

Observations from the 2025 M7.7 Myanmar Earthquake: Impacts in Thailand and Engineering Implications

by Earthquake Engineering Research Institute (EERI)

Applied Sciences & Engineering Engineering & Technology TNCStructural engineeringTNCEEarthquake engineering
🎙 Earthquake Engineering Research Institute (EERI) 👥 118K 📅 October 3, 2025 ⏱ 89 min 👁 573 📄 expert opinion 🧭 2026-08-16
Available in: English (current) Français

Keywords

ground motionbasin effectsseismic designtall buildingsThailand

Summary

This webinar, the second in a two-part series, presents observations from the March 28, 2025 M7.7 Myanmar earthquake, focusing on impacts in Thailand. Dr. Teraphan Ornthammarath from Mahidol University discusses far-field ground motion characteristics in the Bangkok basin, comparing observed ground motions with ground motion prediction equations and the Thai seismic design code. He highlights significant amplification of long-period motions due to the deep Bangkok basin, with observed spectral accelerations exceeding design values. Dr. Pennung Warnitchai from the Asian Institute of Technology then discusses the impact on tall buildings in Bangkok, showing videos of swimming pool sloshing, damage to connecting structures, and the collapse of an under-construction building. He explains the resonance effects between long-period ground motions and tall buildings, and emphasizes the need for updated seismic design provisions. The webinar concludes with a discussion on the implications for engineering practice and future research, including the need to consider basin effects and long-period ground motions in design.

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Critical Evaluation

Value of the Information & Strength of the Argument

The webinar provides valuable firsthand data and observations from a major earthquake, particularly the detailed ground motion recordings and building performance in Bangkok. The presenters effectively argue that the Bangkok basin significantly amplifies long-period ground motions, leading to stronger shaking than predicted by standard models. They support this with comparisons of observed and predicted spectral accelerations, as well as examples of building damage. The argumentation is solid, based on empirical data and established engineering principles, though some conclusions are preliminary and require further investigation.

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Title / Content Match

The title accurately reflects the content, which focuses on the impacts of the 2025 M7.7 Myanmar earthquake in Thailand and the engineering implications.

Quality & Reliability

8/10

The webinar features leading earthquake engineering experts from Thailand and the U.S., presenting firsthand observations and preliminary analyses from the 2025 Myanmar earthquake. The content is based on actual seismic records and field observations, but it is a webinar with expert opinions and preliminary findings, not a peer-reviewed study. The information is credible and well-presented, but some conclusions are still under investigation.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

Concurring Sources

  • EERI Learning From Earthquakes — EERI's flagship reconnaissance program, which this webinar is part of.

Contribution & Novelties

This webinar provides unique observational data from the 2025 Myanmar earthquake, particularly the detailed ground motion recordings in Bangkok and the performance of tall buildings. It highlights the significant amplification of long-period ground motions due to the Bangkok basin, which is crucial for updating seismic design codes. The presenters also discuss the implications for engineering practice, emphasizing the need to consider basin effects and long-period motions in design.

Pour aller plus loin :

  • Bangkok Basin — Provides background on the geological setting of Bangkok.
  • Seismic Hazard Assessment — Overview of seismic hazard assessment methods.
  • Soil-Structure Interaction — Relevant to the response of buildings on soft soil.

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Radar Profile

The radar profile shows high scores across all dimensions, indicating a well-rounded and reliable presentation. The high scores in 'quantite_information' and 'qualite_information' reflect the detailed data and expert analysis, while the 'niveau_technique' score indicates a technical depth suitable for professionals. The 'fiabilite_globale' score is also high, given the credibility of the presenters and organization.

Reliability 8/10

💬 No comments were provided for analysis.