Seismometer

Seismometers are instruments that measure motions of the ground, including those of seismic waves generated by earthquakes, volcanic eruptions, and other seismic sources. Records of seismic waves allow seismologists to map the interior of the Earth, and locate and measure the size of these different sources.
The word derives from the Greek σεισμός, seismós, a shaking or quake, from the verb σείω, seíō, to shake; and μέτρον, métron, measure and was coined by David Milne-Home in 1841, to describe an instrument designed by Scottish physicist James David Forbes.^[1]

Automatic Weather Station

What is an Automatic Weather Station?

An Automatic weather station (AWS) is an automated type of traditional weather station, either to enable measurements from remote areas orto save human labour. The system may report in several different ways. It may be in real -time via a local link to a computer system or via telecommunications or sattelitte systems. GSM mobile pohne technology has also been known to be used. An alternative is the storage of the information in local data stiorage such as flash memory for retreival at a later stage. Most automatic weather stations have Thermometer for measuring temperature, Anemometer for measuring wind speed, Hygrometer for measuring humidity, Barometer for measuring pressure. Some of them even have rain gauge for measuring rainfall, ceilometers for measuring cloud height, present weather sensor or visibility sensor.