HR: 0830h
AN: S41C-0090    [PDF]
TI: 27 january 2003 Pulumur (Mw:6.1) and 01 may 2003 Bingol (Mw:6.4) earthquakes: triggered events in the westward-escape tectonic regime, eastern Turkey
AU: * Emre, O
EM: emre@mta.gov.tr
AF: MTA, General Directorate of Mineral Research and Exploration, Ankara, 06520 Turkey
AU: Herece, E
EM: herece@mta.gov.tr
AF: MTA, General Directorate of Mineral Research and Exploration, Ankara, 06520 Turkey
AU: Dogan, A
EM: dogan@mta.gov.tr
AF: MTA, General Directorate of Mineral Research and Exploration, Ankara, 06520 Turkey
AU: Ozaksoy, V
EM: volkano@mta.gov.tr
AF: MTA, General Directorate of Mineral Research and Exploration, Ankara, 06520 Turkey
AU: Parlak, O
EM: oktay@mta.gov.tr
AF: MTA, General Directorate of Mineral Research and Exploration, Ankara, 06520 Turkey
AU: Ozalp, S
EM: ozalps@mta.gov.tr
AF: MTA, General Directorate of Mineral Research and Exploration, Ankara, 06520 Turkey
AU: Ciplak, R
EM: ciplak@mta.gov.tr
AF: MTA, General Directorate of Mineral Research and Exploration, Ankara, 06520 Turkey
AB: Two moderate earthquakes occurred in the Bingol-Karlyova-Erzincan ~ 300 angle (BKEA), at the eastern corner of the Anatolian block, which is characterized by westward escape. The BKEA is located between North (NAF) and East (EAF) Anatolian faults west of the Karlyova triple junction. It is bounded by large step-over structures: the Erzincan basin on the NAF and Gokdere stepover on the EAF. A conjugate active fault pattern includes NE and NW trending faults parallel to the NAF and EAF. The NW and SE trending faults are right-lateral and left-lateral, respectively. The January 27, 2003 Pulumur Earthquake (Mw:6.1) occurred at the northwest corner of the BKEA. Ten years ago, 13 March 1999, the Erzincan earthquake (Ms: 6.8) occurred at the east of the Erzincan basin and triggered, two days later, the Pulumur Earthquake (Mw:5.8) on Dagyolu fault, which is parallel to the NAF. The 27 January 2003 Pulumur earthquake occurred on the Pulumur fault, which is conjugate to the Dagyolu fault. The Pulumur fault is a left-lateral, north-east trending, and 20 km in length. The January 2003 event might be triggered by 1992 Erzincan earthquake. The 01 May 2003 Bingol earthquake occurred at the southeastern corner of the BKEA. Before the last event, the May 22 1971 Bingol earthquake (Ms:6.8) occurred on the Goynuk segment of the EAF and produced surface rupture. The Bingol-Karakocan and Sudugunu faults are conjugate to the 1971 rupture of EAF. The earthquake in the region, the 01 May 2003 Bingol earthquake, was generated by the Sudugunu fault but did not rupture the surface. However, many landslides and lateral spreading were observed along this fault 20 km-long and N500 W trending fault. The 2003 Pulumur and Bingol earthquakes were close in time and space to the 1992 Erzincan and 1971 Bingol earthquakes, respectively. The series of earthquakes during the last 30 years suggest that triggering is common in the conjugate fault pattern of the BKEA. Therefore, it can be speculated that the 2003 events raised the earthquake potential on the adjacent faults.
DE: 5475 Tectonics (8149)
DE: 7200 SEISMOLOGY
SC: Seismology [S]
MN: 2003 Fall Meeting