How does triangulation work earthquakes

Every earthquake is recorded on numerous seismographs located in different directions. Each seismograph records the times when the first P waves and second S waves seismic waves arrive.

From that information, scientists can determine how fast the waves are traveling. Knowing this helps them calculate the distance from the epicenter to each seismograph. To determine the direction each wave traveled, scientists draw circles around the seismograph locations. The radius of each circle equals the known distance to the epicenter. Interestingly enough though, deep focus earthquakes can occur at depths of hundreds of miles and can be felt literally half a world away.

The Okhotsk Sea Earthquake had it's epicenter off the coast Russia north of Japan at a depth of km miles , with strong shaking felt as far away as Moscow.

Where are most earthquakes located? Most earthquakes occur along the edge of the oceanic and continental plates. The earth's crust the outer layer of the planet is made up of several pieces, called plates.

The plates under the oceans are called oceanic plates and the rest are continental plates. What is triangulation in a family? Triangulation occurs when an outside person intervenes or is drawn into a conflicted or stressful relationship in an attempt to ease tension and facilitate communication.

This situation is often seen in family therapy. What type of ground causes the most destruction? Surface waves, in contrast to body waves can only move along the surface.

They arrive after the main P and S waves and are confined to the outer layers of the Earth. They cause the most surface destruction. What are the four types of triangulation? Denzin identified four basic types of triangulation: Data triangulation: involves time, space, and persons. Investigator triangulation: involves multiple researchers in an investigation. Theory triangulation: involves using more than one theoretical scheme in the interpretation of the phenomenon.

What is the most common type of triangulation? Other cities near Boise can also tell how far away the quake was. The quake is km from Helena, so the scientists draw a km radius circle around Helena.

The Helena and Boise circles meet in two places. One of those was where the Earthquake happened. To decide between the two, a third station is needed. The distance between the third station and the Earthquake is used to figure out where the Earthquake happened.

The quake is km from Salt Lake City. A circle around Salt Lake City hits one of the two dots and that tells us where the Earthquake is. Earthquake triangulation uses the distance to something and figures out the exact location from that. Another kind of triangulation uses the direction to something to figure out location.

Hikers can use radio waves to triangulate their location.