Surface rupture and slip distribution of the 2025 Mw7.7 Mandalay earthquake and updated length scaling of supershear earthquakes
Reitman, Nadine; Wang, Yuanshi; Kuo, Yu-Ting; Hanagan, Catherine Elise; Hatem, Alexandra; DuRoss, Christopher; Chen, Chun-Chi; Goldberg, Dara; Yin, Harriet; Briggs, Richard; Thompson Jobe, Jessica; Nicovich, Sylvia; Lynch, Emerson; Powell, Joseph; Barnhart, William; Schmitt, Robert
The 2025 M w 7.7 Mandalay, Burma (Myanmar), earthquake ruptured 475 km of the central Sagaing fault and is the longest continental strike-slip rupture on record. The observed rupture length is 1.6–4.7 times the value expected (100–300 km) from existing length-magnitude scaling relations for strike-slip earthquakes. The earthquake resulted from shallow dextral faulting and ruptured bilaterally with supershear speeds south of the epicenter, rupturing close to three major cities in Myanmar and expo