Concept information
Preferred term
Seismograph
Type
-
sosa:Sensor
Belongs to group
- Sismologie (fr)
Description
- Instrument that detects and records ground motions (and especially vibrations due to earthquakes) along with timing information. It consists of a seismometer, a precise timing element, and a recording device or data logger.
- To avoid the strong ambient noise caused by ocean waves (microseisms), two types of seismograph have traditionally been used to record seismic signals: one for periods longer than about 10 s and the other for those shorter than 3 s. However, this kind of filtering may result in significant signal distortions and underestimation of earthquake magnitude. A broadband seismograph can record faithfully seismic signals in a frequency range of 3 decades or some 10 octaves (e.g., between 0.1 s to 100 s) or even wider, thanks to the improved linearity range of the seismometer and dynamic range of the recorder
In other languages
-
French
URI
https://service.poleterresolide.fr/voc/instrument/c_a6f7de06
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