Evolution of the Kandilli Observatory and Earthquake Research Institute (KOERI) Seismic Network and the Data Center Facilities as a Primary Node of EIDA

Abstract

As the earliest institute in Turkey dedicated to locating, recording, and archiving earthquakes in the region, the Kandilli Observatory and Earthquake Research Institute (KOERI) has a long history in seismic observation, which dates back to the installation of its first seismometers soon after the devastating Istanbul earthquake of 10 July 1894. For over a century, since the deployment of its first seismometer, the KOERI seismic network has grown steadily in time. In this article, we present the KOERI seismic network facilities as a data center for the seismological community, providing data and services through the European Integrated Data Archive (EIDA) and the Rapid Raw Strong-Motion (RRSM) database, both integrated in the Observatories and Research Facilities for European Seismology (ORFEUS). The objective of this article is to provide an overview of the KOERI seismic services within ORFEUS and to introduce some of the procedures that allow to check the health of the seismic network and the quality of the data recorded at KOERI seismic stations, which are shared through EIDA and RRSM.

KOERI’s Tsunami Warning System in the Eastern Mediterranean and Its Connected Seas: A Decade of Achievements and Challenges

“…Seismic monitoring facilities have continued for more than a century since the installation of the first seismometer in 1895. Details of KOERI earthquake catalogues [5,6] and seismic network evolutions [6,7] have been presented in earlier studies. In order to obtain reliable earthquake parameters, today REMTC operates a seismic network including 256 sensors that comprise broadband (BB), accelerometer (SM) and short-period (SP) seismometers.…”

Seismicity of Turkey and Real-Time Seismology Applications in Determining Earthquake Hazard

“…Events are recorded real time at the monitoring center digital form obtained from broad-band stations. These are processed using HYPO71 for the hypocenter determination [1]. The seismological division of KOERI determines, as rapidly and accurate as possible, location and size of all earthquakes of magnitude commonly larger than 2.0 that occur in the country [1].…”

“…These are processed using HYPO71 for the hypocenter determination [1]. The seismological division of KOERI determines, as rapidly and accurate as possible, location and size of all earthquakes of magnitude commonly larger than 2.0 that occur in the country [1]. It provides twenty-four hour information service to government agencies, to government public information centers and to news media.…”

“…This consists of the North Anatolian Fault Zone (NAFZ), East Anatolian Fault Zone (EAFZ) and South Eastern Anatolian Thrust Zone (SAT) which form the borders of the Anatolian Plate and important active fault segments throughout Western Anatolia. All these active faults cause a short time intervals intensive damages in Turkey earthquakes, which in turn is a significant risk of earthquake in Turkey [1].…”

“…Real-time seismology is achieved by three kind sof seismological observations which are phase readings, waveforms and catalogues [1].The earthquake catalogues are the first output of seismological observations. Several institutions around the world generate national and international catalogues for understanding the seismic activity of a region.…”