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 are seismograph records?

Seismographs are instruments used to record the motion of the ground during an earthquake. ... As the seismograph shakes under the mass, the recording device on the mass records the relative motion between itself and the rest of the instrument, thus recording the ground motion.

What is the paper record of an earthquake called?

A seismograph, or seismometer, is an instrument used to detect and record earthquakes.

How do you read a seismogram?

The seismogram is "read" like a book, from left to right and top to bottom (this is the direction that time increases). As with a book, the right end of any horizontal line "connects" with the left end of the line below it. Each line represents 15 minutes of data; four lines per hour.

What are the lines on a seismograph called?

When you look at a seismogram, there will be wiggly lines all across it. These are all the seismic waves that the seismograph has recorded.

Make your own seismograph!

What is seismograph and seismogram?

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 are surface waves called?

The two types of surface waves are named Love waves and Rayleigh waves, after the scientists who identified them. Love waves have a horizontal motion that moves the surface from side to side perpendicular to the direction the wave is traveling. Of the two surface waves, Love waves move faster.

What is a Webicorder?

The webicorder is the digital version of the. paper records used by scientists in days of. yore. Seismometers measure vibrations.

Is hypocenter and focus the same?

The hypocenter is the point within the earth where an earthquake rupture starts. ... Also commonly termed the focus.

What is a seismograph quizlet?

A seismograph is an instrument that records and measures the details of an earthquake. ... A seismograph records data using a seismogram. A seismogram is a record made by the seismograph. You just studied 9 terms!

What do we call the output of a seismograph which records traces of motion?

A seismogram is a graph output by a seismograph. It is a record of the ground motion at a measuring station as a function of time.

In what form the seismograph gives the record of the waves?

A seismograph, or seismometer, is an instrument used to detect and record seismic waves. Seismic waves are propagating vibrations that carry energy from the source of an earthquake outward in all directions. They travel through the interior of the Earth and can be measured with sensitive detectors called seismographs.

What is the difference between Richter scale and seismograph?

A seismograph is an instrument used to detect and record earthquakes. It is also known as a seismometer. It records the motion of the ground during a quake. The Richter scale is a numerical value used to measure the power or magnitude of earthquakes.

Is seismograph analog computer?

Delivered seismometers come with two styles of output: analog and digital. Analog seismographs require analog recording equipment, possibly including an analog-to-digital converter. The output of a digital seismograph can be simply input to a computer.

What is the use of magnet in seismograph?

A large permanent magnet is used for the mass and the outside case contains numerous coils of fine wire. Movements of the magnet relative to the case generate small electric signals in the wire, which can be sent to a computer or recorded onto paper to create a seismogram.

What are the seismic waves?

A seismic wave is an elastic wave generated by an impulse such as an earthquake or an explosion. Seismic waves may travel either along or near the earth's surface (Rayleigh and Love waves) or through the earth's interior (P and S waves).

How do you find the hypocenter?

The hypocenter and origin time are determined by arrival times, incidence direction (backazimuth) and/or horizontal velocity of seismic phases radiated by the first break of the earthquake rupture. This is true when using any P or S phases since their propagation velocity is always larger than the rupture velocity.

What is the difference between Epicentre and Hypocentre?

The difference between Epicenter and Hypocenter is that Epicenter appears on or above the surface of the Earth, whereas Hypocenter appears beneath the surface of Earth. ... The Hypocenter is the point that is below the surface of the earth. It is referred to as the actual point from where earthquake ultimately originate.

Do Mainshocks always have aftershocks?

The mainshock is the largest earthquake in a sequence, sometimes preceded by one or more foreshocks, and almost always followed by many aftershocks.

What is the highest score on the Richter scale?

In theory, the Richter scale has no upper limit, but, in practice, no earthquake has ever been registered on the scale above magnitude 8.6. (That was the Richter magnitude for the Chile earthquake of 1960. The moment magnitude for this event was measured at 9.5.).

What does seismic refer to?

1 : of, subject to, or caused by an earthquake also : of or relating to an earth vibration caused by something else (such as an explosion or the impact of a meteorite) 2 : of or relating to a vibration on a celestial body (such as the moon) comparable to a seismic event on earth.

What's an example of surface wave?

In physics, a surface wave is a mechanical wave that propagates along the interface between differing media. A common example is gravity waves along the surface of liquids, such as ocean waves. ... Elastic surface waves can travel along the surface of solids, such as Rayleigh or Love waves.

What are the 4 types of seismic waves?

• P-wave Motion. P-wave:the primary body wave; the first seismic wave detected by seismographs; able to move through both liquid and solid rock. ...
• S-wave Motion. ...
• Rayleigh-wave Motion. ...
• Love-wave Motion.