1969 Alaşehir earthquake
UTC time | 1969-03-28 01:48:32 |
---|---|
ISC event | 811616 |
USGS-ANSS | ComCat |
Local date | March 28, 1969 |
Local time | 03:48:32 |
Magnitude | Mw 6.8 |
Depth | 10 km (6.2 mi)[1] |
Epicenter | 38°30′54″N 28°32′46″E / 38.515°N 28.546°E |
Areas affected | Turkey |
Max. intensity | MSK-64 VIII (Damaging)[2] |
Casualties | 53 dead |
The 1969 Alaşehir earthquake occurred on March 28 at 03:48 local time near the city of
Tectonic setting
The Alaşehir region is dominated by
Earthquake
The earthquake occurred in the Alaşehir Valley where normal faulting was the mechanism; occurring along a northwest–southeast striking, northeast dipping plane. Surface ruptures developed in the valley where the earthquake occurred. At least six surface ruptures were traced uninterrupted for long distances. The longest rupture was measured more than 12 km (7.5 mi) long. The total length of measured surface rupture was 30–36 km (19–22 mi); extending from Dereköy, through Alaşehir and terminating at Doğuşlar. An average surface offset of 20 cm (7.9 in) was measured. However the measurement was recorded a week after the event hence aseismic creep may have occurred and contaminated actual coseismic offset measurements.[5]
An intense aftershock sequence followed the mainshock.[5] One of these aftershocks was recorded mb 4.6. Felt report of aftershocks by locals have been debunked as separate seismic activity in Demirci, where another severe earthquake occurred on March 23.[5]
Impact
At least 53 people died. Land failure and landslides on the slopes of the valleys contributed to heavy damage. Many small villages suffered great destruction. At least 3,072 buildings were damaged or destroyed.[6] The Demirköprü Dam however, was undamaged.[4][3]
See also
References
- ^ ISC (27 June 2022), ISC-GEM Global Instrumental Earthquake Catalogue (1900–2009), Version 9.1, International Seismological Centre
- Bibcode:2009EGUGA..11.2655E.
- ^ a b "28 MART 1969 MANİSA DEPREMİ" (in Turkish). AFAD. Retrieved 5 January 2022.
- ^ a b "Significant Earthquake Information". ngdc.noaa.gov. NOAA National Centers for Environmental Information. Retrieved 5 January 2022.
- ^ .
- ^ "Important earthquakes in Turkey in 1900-2004 that have caused casualties and damage (Ms > 5.0)". koeri.boun.edu.tr (in Turkish). Kandilli Observatory. Retrieved 6 January 2022.
External links
- The International Seismological Centre has a bibliography and/or authoritative data for this event.