Seismic Equipment

Theodolite A theodolite is used for measuring both horizontal and vertical angles, as used in triangulation networks. It is a key tool in surveying and engineering work, but theodolites have been adapted for other specialized purposes in fields like meteorology and rocket launch technology.

Seismometer Seismometers are instruments that measure and record motions of the ground, including those of seismic waves generated by earthquakes, nuclear explosions, and other seismic sources.

Tiltmeter A tiltmeter is an instrument designed to measure very small changes from the horizontal level, either on the ground or in structures. A similar term, in less common usage, is the inclinometer.

pH data logger A pH meter is an electronic instrument used to measure the pH (acidity or alkalinity) of a liquid.

Laser Range Finder A Laser rangefinder is a device which uses a laser beam in order to determine the distance to a reflective object. The time taken for the reflected beam to return to the unit is used to calculate distance.

COSPEC analyser Gas emissions are monitored with equipment such as the Correlation Spectrometer (COSPEC) which analyzes the presence of volcanic gases such as sulfur dioxide. Increased emissions possibly signal an impending volcanic eruption.

COSPEC analyser InSAR stands for Interferometric Synthetic Aperture Radar. This is a remote sensing technique that uses radar satellite images. The satellite constantly shoot beams of radar waves towards the earth and record them after they bounced back off the Earth's surface