What can two seismic recordings seismograms tell you about an earthquake?
What can two seismic recordings seismograms tell you about an earthquake?
A recording of an earthquake has recognizable characteristics. Typically, one can recognize the arrival of different wave types: P (the fastest traveling waves), S (shear waves), and surface waves. On these seismograms you may see local earthquakes in Northern California and earthquakes elsewhere in the world.
What kind of data do seismograms indicate?
Seismic data plots (seismograms) provide a visual record of earthquake activity, as well as other vibrations in the earth caused by natural and man-made phenomena. For example, seismographs located near shipping routes are able to detect the passage of freighters and cruise ships.
What is the meaning of seismographs?
Seismograph, instrument that makes a record of seismic waves caused by an earthquake, explosion, or other Earth-shaking phenomenon. A record produced by a seismograph on a display screen or paper printout is called a seismogram.
What is the use of seismograms?
A seismograph, or seismometer, is an instrument used to detect and record earthquakes. Generally, it consists of a mass attached to a fixed base.
What is the atomic bomb equivalent to a 8.0 earthquake?
Seismic energy by magnitude compared:
| Magnitude | Energy in joules (J) | TNT equiv. |
|---|---|---|
| 5.0 | 2.0 x 1012 | 500 tons of TNT |
| 6.0 | 6.3 x 1013 | 15 kilotons of TNT |
| 7.0 | 2.0 x 1015 | 500 kilotons of TNT |
| 8.0 | 6.3 x 1016 | 15 million tons of TNT |
Where is the largest seismograph on earth?
Science Center Objects
| Mag | Location | |
|---|---|---|
| 1. | 9.5 | Bio-Bio, Chile |
| 2. | 9.2 | Southern Alaska |
| 3. | 9.1 | Off the West Coast of Northern Sumatra |
| 4. | 9.1 | Near the East Coast of Honshu, Japan |
What is seismograph answer in one word?
A seismograph is an instrument scientists use to measure the strength of an earthquake. Seismograph comes from the Greek words seismos, “earthquake,” and graph, “writing.”
Who uses seismometer?
geologists
A seismometer, or seismograph, is a device that geologists use to measure and record seismic waves. By studying these recordings, scientists can map the earth’s interior, and they can measure or locate earthquakes and other ground motions.
How are seismograms created?
When there is an earthquake, everything in the seismograph moves except the weight with the pen on it. As the drum and paper shake next to the pen, the pen makes squiggly lines on the paper, creating a record of the earthquake. This record made by the seismograph is called a seismogram.
Which is the correct definition of a seismogram?
It is a record of the ground motion at a measuring station as a function of time. Seismograms typically record motions in three cartesian axes, with the z axis perpendicular to the Earth’s surface and the x- and y- axes parallel to the surface.
Where are the seismograms located in Northern California?
The seismograms displayed are from a few of the seismograph stations routinely recorded by the Northern California Seismograph Network. Each is a record of how the ground moved at a particular seismograph station in Northern California during a 24-hour period.
What causes a microseism on a seismograph?
These tiny microseisms can be caused by heavy traffic near the seismograph, waves hitting a beach, the wind, and any number of other ordinary things that cause some shaking of the seismograph. Historically, seismograms were recorded on paper attached to rotating drums.
What is the difference between a seismogram and a ground shaker?
In reality, these mechanisms are no longer manual, but instead work by measuring electronic changes produced by the motion of the ground with respect to the mass. A seismogram is the recording of the ground shaking at the specific location of the instrument.