Related Experiment Video
Updated: Jun 22, 2025

The Role of Fabric in Frictional Properties of Phyllosilicate-Rich Tectonic Faults
Published on: November 6, 2021
Slow rupture in a fluid-rich fault zone initiated the 2024 Mw 7.5 Noto earthquake
Zhangfeng Ma1, Hongyu Zeng1,2, Haipeng Luo1,3
1Earth Observatory of Singapore, Nanyang Technological University, Singapore.
Abstract:
The 2024 moment magnitude 7.5 Noto Peninsula (Japan) earthquake caused devastation to communities and was generated by a complex rupture process. Using space geodetic and seismic observations, we have shown that the event deformed the peninsula with a peak uplift reaching 5 meters at the west coast. Shallow slip exceeded 10 meters on an offshore fault. Peak stress drop was greater than 10 megapascals. This devastating event began with a slow rupture propagation lasting 15 to 20 seconds near its hypocenter, where seismic swarms had surged since 2020 because of lower-crust fluid supply. The slow start was accompanied by intense high-frequency seismic radiation. These observations suggest a distinct coseismic slip mode reflecting high heterogeneity in fault properties within a fluid-rich fault zone.
Related Concept Videos
Normal Stress
When a rod is under axial loading, the internal forces and corresponding stress are normal to the plane of the section, so it is termed normal stress. It's...
Elastic Strain Energy for Shearing Stresses
Bending Moment Diagram
Determine reactive forces and couple moments: Calculate all the reactive forces and couple moments acting on the beam. In certain cases, when the beam is inclined at an...
Elastic Strain Energy for Normal Stresses
If...
Magnetostatic Boundary Conditions
Stress-Strain Diagram

