What is surface faulting or surface rupture in an earthquake?
Surface rupture occurs when movement on a fault deep within the earth breaks through to the surface. NOT ALL earthquakes result in surface rupture.
Can the position of the moon or the planets affect seismicity? Are there more earthquakes in the morning/in the evening/at a certain time of the month?
Scientists from the U.S. Geological Survey (USGS) and their partners studying the largest on-land earthquake in North America in almost 150 years report new information that will help further safety-planning efforts for future large quakes, according to an article published in the May 16, 2003, edition of the journal Science.
Sunday’s magnitude 7.9 earthquake in central Alaska created a scar across the landscape for more than 145 miles, according to surveys conducted the past two days by geologists from the U.S. Geological Survey and the Alaska Division of Geological and Geophysical Survey.
Title: Underwater Secrets of the Hayward Fault Zone: Integrated 3D imaging to understand earthquake hazards
- Underwater imaging provides a unique opportunity to study urban fault hazards.
- How do we link surface structures to depths where earthquakes occur?
- How does "acoustic trenching" help us understand earthquake history?
Photograph of surface fractures along fault south of Pinto Wash; view to the northeast.
Vertical surface fractures along Ocotillo Fault. Faulting here is associated with the nearby Mw5.7 aftershock of June 14, 2010. Tape measure for scale.
Fault scarp (above change in slope) with fractures (white arrows) along Yuha Fault; view to the northwest. Yellow notebook (in center) for scale.
Fresh surface fractures (black arrows) along Brawley Fault Zone and across Ralph Road in response to the 2010 El Mayor-Cucapah earthquake; view to the north. Slight vertical component of slip (2 mm, up on east [right] side) more noticeable at white arrow.
The Denali fault offset crevasses on the Canwell Glacier.
Near the southeast extent of the surface rupture of the Totschunda fault thrust faulting pushed the frozen sand and gravel over the snow surface.
View southeast along the Totschunda fault.
At pass west of Delta River. Here there was roughly 5 m of offset. Note the push up in the background. There is permafrost at the bottom of the cracks.
The fault is clearly expressed through this pasture at N40 41.959', E030 30.196'. Offset of a small road is 2.4 m (a maximum).