How far was the epicenter of the earthquake from Christchurch?
The earthquake’s epicentre was 40 kilometres (25 mi) west of Christchurch, close to the town of Darfield. The hypocentre was at a depth of 10 km. A foreshock of roughly magnitude 5.8 hit five seconds before the main quake, and strong aftershocks were reported, up to magnitude 5.4.
How far from the epicenter can an earthquake be felt?
A magnitude 4.0 eastern U.S. earthquake typically can be felt at many places as far as 60 miles from where it occurred, and it infrequently causes damage near its source. A magnitude 5.5 eastern U.S. earthquake usually can be felt as far as 300 miles from where it occurred, and sometimes causes damage out to 25 miles.
Why dont aftershocks occur in the same place?
Earthquakes come in clusters. Aftershocks are earthquakes that usually occur near the mainshock. The stress on the mainshock’s fault changes during the mainshock and most of the aftershocks occur on the same fault. Sometimes the change in stress is great enough to trigger aftershocks on nearby faults as well.
There are a number of criteria involved in how far away from an epicenter one can feel a earthquake. I’m not a geologist and study earthquakes as a hobby, but I do know that what’s in the ground makes all huge difference. At the epicenter there may not be as much shaking as there is at great distance.
Where was the epicenter of the 1964 Alaska earthquake?
That’s a distance of about 400 miles from an epicenter, but it is well known that during the Alaska quake of 1964 (mag 9.2), shaking was felt as far away as Florida.
Where was the epicenter of the Loma Prieta earthquake?
The 6.8 Loma Prieta quake that devastated San Francisco and Oakland was in progress. That’s a distance of about 400 miles from an epicenter, but it is well known that during the Alaska quake of 1964 (mag 9.2), shaking was felt as far away as Florida.
Where was epicenter of 2013 Okhotsk Sea earthquake?
The 2013 Okhotsk Sea Earthquake had it’s epicenter off the coast Russia north of Japan at a depth of 609 km (380 miles), with strong shaking felt as far away as Moscow. Seismic waves from large earthquakes pass throughout the Earth. These waves contain vital information about the internal structure of the Earth.