Seismograph
An instrument that records seismic waves.
Self-Sustaining Star Formation ...
There are seismographs all over the world, so geologists can measure the travel times between the arrivals of the P- and S-waves (remember, they travel at different speeds) and this gives them an idea of the distance to the location of the ...
[ Top of Page ]
368. Seismograph
An instrument that records seismic waves.
Even without the luxury of seismographs on the surface, we can infer that most of its interior must be dominated by a large, heavy, iron-rich core with a radius of perhaps 1800 km. Whether that core is solid or liquid remains to be determined.
They deployed the EASEP, which included a passive seismograph and a laser ranging retroreflector. Then Armstrong loped about 120 m (400 ft) from the LM to snap photos at the rim of East Crater while Aldrin collected two core tubes.
The magnitude of an earthquake is calculated from the logarithm of the amplitude of waves recorded by seismographs. Beno Gutenberg also contributed to the more general application of the Richter scale. A magnitude 2.
Earthquakes are recorded with a seismometer, also known as a seismograph....
s striking in a specific area within a short period of time. They are different from earthquakes followed by a series of aftershock ...
Since the energy from motion grows as the square of the velocity, this gives moving rock more energy per kilogram than ordinary chemical explosives. Massive objects can easily cause kiloton explosions that resemble nuclear explosions. Seismographs ...
Each spacecraft carried a lander equipped with life-detecting and chemical laboratories, two color television cameras, weather and seismographic instruments, and a 3-m (10-ft) retractable claw designed to be manipulated from the earth.
The existence of these types of seismic waves was predicted during the 19th century, and modern investigators have found that there is a close correspondence between such theoretical calculations and seismographic measurements of the waves.
also contributed to the more general application of the Richter scale. A magnitude 2.0 or less earthquake is called a microearthquake and is not felt by people. A magnitude 4.5 or more earthquake can be measured by seismographs all over the world.
Seismology on Earth deals with the study of vibrations that are produced by earthquakes, the impact of meteorites, or artificial means such as an explosion. On these occasions, a seismograph is used to measure and record the actual movements and ...
Zhang was well-known for his brilliant applications of mechanical gears, as this was one of his most impressive inventions (alongside his seismograph to detect the cardinal direction of earthquakes that struck hundreds of miles away).
 See also: Earth, Time, Second, Crust, Year
  
|
RSS
