Seismographic Station

Seismographic Station

 

a station for recording oscillations of the earth’s surface caused by earthquakes and for the primary processing of the records obtained. Seismographic stations are subdivided into long-range and regional stations depending on the tasks they perform.

Long-range stations are designed to record seismic signals for the most part at epicentral distances greater than 2,000 km. These stations have standard seismological equipment: short-period seismographs that are highly sensitive in a passband of 10–0.7 Hz, broadband seismographs of medium sensitivity in a passband of 10–0.05 Hz; and, at some stations, long-period seismographs of medium sensitivity in a passband of 0.2–0.015 Hz.

Regional stations are designed to record nearby earthquakes with epicentral distances up to 2,000 km. These stations have short-period equipment and also record strong movements in a passband of 10–0,1 Hz.

In 1974 there were more than 2,000 seismographic stations in the world network, including more than 200 in the USSR. All seismographic stations record earthquakes according to Greenwich time and carry out primary processing of seismograms by measuring the arrival times of different seismic waves and the dynamic parameters of the waves. This information is sent by government communications channels to the appropriate processing centers and provides the raw data for seismological bulletins. Seismographie stations operate in conformity with instructions and guidelines prepared both at the centers of national seismological services and by international seismological organizations.

REFERENCES

Apparatura i metodika nabliudenii na seismicheskikh stantsiiakh SSR. Moscow, 1962.
Apparatura i metodika seismometricheskikh nabliudenii v SSSR. Moscow, 1974.

Z. I. ARANOVICH and N. V. KONDORSKAIA

References in periodicals archive ?
At that time, only one seismographic station existed in Portugal mainland, at the Observatory of Coimbra University (COI), and one in the Azores islands (Ponta Delgada--PDA).
His Highness Dr Shaikh Sultan Bin Mohammad Al Qasimi, Supreme Council Member and Ruler of Sharjah, launched the University of Sharjah's seismographic station, which is linked to the Global Seismographic Network (GSN) that caters to the Gulf region.
inaugurated Sunday the University of Sharjah's (UoS) seismographic station
[1] Edmundo Norabuena, A brief history of the seismographic station at Nana, Peru; IRIS Newsletter 13, 8 (1994).
Con motivo del centenario de la Seismographic Station de la Universidad de Berkeley, se publica un volumen conmemorativo.
Professor Mohammed emphasized that the Federal Government should take proactive and not reactive measures; empower relevant research agencies mandated to carry studies into the remote causes of the tremor and proffer solutions and procurement and installation of more seismometers, ground-based magnetometers and GPS sensors/equipment for the enlargement and networking of the Nigeria National Network of Seismographic Stations.
The event was well recorded by the global seismographic stations, including the Botswana seismic stations at Sekoma (SKOMA) and Magotlhwane (LBTB) as well as stations in South Africa, Namibia, Zimbabwe and Zambia.
They have 25 seismographic stations relaying information to 26 national tsunami information centres, as well as six deep-ocean buoys to assess and report of an impending tsunami.
SYSTEM ACTIVATED IN JUNE 2006 Made up of seismographic stations and deep-ocean sensors, the Indian Ocean Tsunami Warning System was activated in June 2006 after being agreed 17 months earlier at a United Nations conference in Japan.
operates a nationwide network of seismographic stations called the
While there were seismic instruments and some seismographic stations in place at the time to detect earthquakes, there was no tsunami warning system in the region, said Kong.
In fact, the optimum location to observe and measure seismic waves that pass through Earth's core lies in the central Atlantic Ocean--where there are few seismographic stations!