How do you calculate the epicenter of an earthquake?
How do you calculate the epicenter of an earthquake?
Measure the difference in arrival times between the first shear (s) wave and the first compressional (p) wave, which can be interpreted from the seismogram. Multiply the difference by 8.4 to estimate the distance, in kilometers, from the seismograph station to the epicenter.
Where is this earthquake’s epicenter?
The epicenter is the point on the earth’s surface vertically above the hypocenter (or focus), point in the crust where a seismic rupture begins.
Which point in Figure 1 is the epicenter of the earthquake?
As shown in Figure 1, the point on the surface directly above the focus is called the epicenter. An earthquake epicenter can be located from records made of earthquake waves on devices called seismographs….
| Recording Station | Calculated Distance (miles)? |
|---|---|
| Salt Lake City: | miles |
How do you find the epicenter?
Scientists use triangulation to find the epicenter of an earthquake. When seismic data is collected from at least three different locations, it can be used to determine the epicenter by where it intersects. Every earthquake is recorded on numerous seismographs located in different directions.
Is focus and epicenter the same Why?
The focus is the place inside Earth’s crust where an earthquake originates. The point on the Earth’s surface directly above the focus is the epicenter. When energy is released at the focus, seismic waves travel outward from that point in all directions.
Which wave is the most destructive?
surface waves
Of the two types of surface waves, the L-waves are the most destructive. They can literally move the ground beneath a building faster than the building itself can respond, effectively shearing the base off of the rest of the building.
How to calculate the epicenter of an earthquake?
Refer to the Earthquake Time Travel Graph. Determine the location on the graph where the two curves have a time difference equal to the time difference you previously calculated. After looking at the Earthquake Time Travel Graph, it is clear that the two curves have a difference of 5 units on the time axis at x = 3.4.
Where was the epicenter of the Sumatra earthquake in 2005?
On Monday night March 28, 2005 at 11:09 pm local time, the Nias and Simeulue islands were shaken by a M8.7 earthquake with a depth of 30 km. The epicenter of the earth- quake was on the Great Sumatran fault, between the two islands at 2.074°N, 97.013°E (see Figure 1).
Where was the epicenter of the 1964 Alaska earthquake?
Map of southern Alaska showing the epicenter of the 1964 Great Alaska Earthquake (red star). On March 27, 1964 at 5:36pm local time (March 28 at 3:36 UTC) a great earthquake of magnitude 9.2 occurred in the Prince William Sound region of Alaska.
What was the magnitude of the earthquake in March 2005?
A small tsunami was generated by this latest earthquake. Origin Time – The earthquake occurred on Monday, 28 March 2005, at 16:09:36 UTC Magnitude – The magnitude of the earthquake was variously reported by monitoring agencies as 8.7 and 8.5.