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An instrument for automatically detecting and recording the intensity, direction, and duration of a movement of the ground, especially of an earthquake.

seis·mog′ra·pher (sīz-mŏg′rə-fər) n.
seis′mo·graph′ic (-grăf′ĭk), seis′mo·graph′i·cal (-ĭ-kəl) adj.
seis·mog′ra·phy n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
Following the start of the drilling a Turkish seismographic research vessel entered plot 4, accompanied by Turkish warships.
He added that during his meeting with Parly, he will also refer to Turkish provocations in the Eastern Mediterranean and the presence of the Turkish seismographic research vessel Barbaros southwest of Paphos.
The Himalayan range is also in the active Eurasia seismographic zone where movement of tectonic plates cause the earth to tremble too frequently leading to large scale landslides.
Scientists from Southern Methodist University then deployed a seismographic network that recorded numerous aftershocks.
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.
Dense black zigzags suggesting spiky seismographic data cover some plates, and among the smudges one could pick out the whorls of printers' thumbprints.
Anak Krakatoa caused hundreds of mild tremors on Thursday, according to seismographic data from the agency.
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.
When a major earthquake occurs anywhere on the planet, ( modern global seismographic networks and rapid response protocols  now enable scientists, emergency responders and the public to assess it quickly 6 typically, within tens of minutes or less 6 including location, magnitude, ground motion and estimated casualties and property losses.
In addition to the signature core curriculum, the three-day Surface Blasting course will add special presenter Randy Wheeler of White Industrial Seismology Inc., who will instruct attendees on proper seismographic placement, signature hole technology and wave form analysis.