Title:
Field Investigation Report on Damage from the March 2025 Myanmar Earthquake

Authour:
Yuki OSHIRO¹, Takeshi KITAHARA^2,3, Yasuo KITANE⁴, and Kunitomo SUGIURA⁵

¹ Member of JSCE, Assistant Professor, Dept. of Civil Eng., University of the Ryukyus
² Member of JSCE, Professor, Dept. of Civil Eng., Kanto Gakuin University
³ Member of JSCE, Program-Specific Professor, GSGES, Kyoto University
⁴ Member of JSCE, Professor, Dept. of Civil and Earth Resources Eng., Kyoto University
⁵ Member of JSCE, Visiting Professor, GSGES, Kyoto University

Key Facts

• Hazard Type: Earthquake
• Date of the disaster: March 28, 2025
• Location of the survey: Sagaing, Mandalay, Myanmar
• Date of the field survey: August 15, 2025
• Survey tools: Digital camera, GPS

Key findings: 
1) For the Yadanarpon Bridge investigated in this study, comparisons between the observed damage and analytical findings confirmed that the transverse bracing between the bearings is a particularly critical structural component. In addition, the overall structure was found to be inclined toward the downstream side; interviews with local engineers further indicated that how to address this in cli-nation will be a key issue in future repair works.
2) At Sagaing Technological University, extensive damage was identified inside the buildings, including buckling of longitudinal reinforcing bars in columns and widespread shear failure of walls. Surface ground offsets associated with fault slip were also observed in the vicinity of the university.

Key Words: 2025 Myanmar Earthquake, Sagaing Fault, damage to bridges, damage to buildings, repair

Paper: PDF 2,115KB

Title:
Study team report of the July 27, 2022 Magnitude (Mw) 7.0 Northwestern Luzon Philippines Earthquake

Authour:
Lessandro Estelito GARCIANO^1,2, Ariel SANTOS², Mark Elson LUCIO², Ademar PAMA², Ernesto MALICAD Jr.², Randy TABADERO², Danny DOMINGO², Villamor ABAD², Dorothy Maureen RALLECA², Vincent PILIEN², Aristotle DOMINGO², Christine Abegail PANTI³, and Kerby RUBINAS³

¹ Professor, Department of Civil Engineering, De La Salle University
² Association of Structural Engineers of the Philippines (ASEP) Study Team
³ Undergraduate Student, Department of Civil Engineering, De La Salle University

Key Facts

• Hazard Type: Earthquake
• Date of the disaster: July 27, 2022
• Location of the survey: Abra and Ilocos Sur, Philippines
• Date of the field survey: August 1-3, 2022
• Survey tools: Cameras, calipers, laser meters, drones, and inclinometers

Key findings: 
1) The epicenter of the magnitude 7.0 earthquake was located approximately 3 km away from Tayum, Abra, Philippines. Its origin was tectonic generated from the oblique movement of the Abra River Fault.
2) Damage to houses, schools, hospitals, churches and cultural heritage structures, and roads and bridges were significant and widespread.
3) Numerous landslides, sand boils, and ground fissures were also recorded.

Key Words: earthquake, damage to infrastructure, structural damage, cultural heritage, landslide

Paper: PDF 2,304KB

Title:
Reconnaissance Report on Bridge Damage caused by the January 1st, 2024, Noto Peninsula Earthquake, Japan

Authour:
Keita UEMURA¹, Kazuma INOUE², and Yoshikazu TAKAHASHI³

¹ Member of JSCE, Assistant Professor, Dept. of Civil and Earth Resources Eng. , Kyoto University
² Member of JSCE, Associate professor, Dept. of Civil Eng., National Institute of Technology, Gunma College
³ Member of JSCE, Professor, Dept. of Civil and Earth Resources Eng. , Kyoto University

Key Facts

• Hazard Type: Earthquake
• Date of the disaster: January 1st, 2024
• Location of the survey: Anamizu City, Nanao City, Shika Town, Suzu City, Wajima City
• Date of the field survey: January 20th – 22nd, April 23rd - 25th, 2024
• Survey tools: Digital Camera, GPS

Key findings: 
Damage to the piers was limited, with most of the bridge damage resulting fromground deformation behind the abutments. In some cases, settlement of the ground caused abutmentsto tilt, leading to damage to bearings at the bridge ends.

Key Words: Noto Peninsula Earthquke, Damage to bridge, Pier, Abutment, Bearing

Paper: PDF 2,261KB

Title:
Preliminary Report of the Damage by the 2022 Off Fukushima Prefecture Earthquake Mj7.4, Japan

Authour:
Kazuma INOUE¹, Keita UEMURA², Keita SAITOH³, Kento ASAMI⁴, and Kotaro UCHIYAMA⁵

¹ Member of JSCE, Associate professor, Dept. of Civil Eng., National Institute of Technology, Gunma College
² Member of JSCE, Assistant Professor, Dept. of Civil and Earth Resources Eng. , Kyoto University
³ Member of JSCE, Student, Dept. of Urban Management, Kyoto University
⁴ Member of JSCE, Student, Dept. of Environmental Eng., National Institute of Technology, Gunma College
⁵ Member of JSCE, Student, Dept. of Environmental Eng., National Institute of Technology, Gunma College

Key Facts

• Hazard Type: Earthquake
• Date of the disaster: March 16th, 2022
• Location of the survey: Fukushima and Miyagi prefectures, Japan
• Date of the field survey: March 18th and 19th, 2022
• Survey tools: Digital Camera, GPS

Key findings: 
1) The superstructure collided against the western side abutment in the Date bridge.
2) The bearing pin was unfastened in the Showa Bridge.
3) The steps of intermediate piers can be confirmed in the Danzaki bridge.
4) The viaduct tilt due to Shear failure of columns was observed in Kunimi Town.

Key Words: Offshore the Fukushima Prefecture Earthquake, Geotechnical damage, Damage to bridges, Damage to Shinkanssen structure

Paper: PDF 3,303KB