1927 Crimean earthquakes

Earthquakes in the Black Sea near Crimea 1927 Crimean earthquakes Crimea 1927-09-11 22:15:51 909503 iscgem909503 1927 09 12 00:15 6.7 w y 35 km on 44.428 N 34.422 E type:event inline,title Unknown Yalta, Crimea VIII Yes 6.0 (est) June 26 at 11:20 UTC 4.9 (est) Sept 16 at 08:21 UTC 12 thumb | right | alt=Swallow's nest. Consequences of the June earthquake of 1927. | Swallow's nest. Consequences of the June earthquake of 1927. The 1927 Crimean earthquakes occurred in the month of June and again in September in the waters of the Black Sea near the Crimean Peninsula. Each of the submarine earthquakes in the sequence triggered tsunami. The June event was moderate relative to the large September 11 event, which had at least one aftershock that also generated a tsunami. Following the large September event, natural gas that was released from the sea floor created flames that were visible along the coastline, and was accompanied by bright flashes and explosions. June 26 event The June shock was a strong event with a magnitude of 6.0 that caused a nondestructive tsunami along the coast. The shock occurred at a depth of 27 km on the submarine slope near Yalta. The shock's intensity was gauged to be VII–VIII (Very strong–Damaging) on the Medvedev–Sponheuer–Karnik scale. Tide gauge stations recorded waves with a maximum amplitude of 16 cm at Yalta, 14 cm at Yevpatoria, and 8 cm at Feodosia.Tsunamis in the Black Sea: Comparison of the historical, instrumental, and numerical data A. Yalçiner E. Pelinovsky T. Talipova A. Kurkin A. Kozelkov A. Zaitsev 2004 Journal of Geophysical Research 109 C12 10.1029/2003JC002113 5, 6 2004JGRC..10912023Y free 11511/36516 free September 11 event The September event struck the Crimean Peninsula with a moment magnitude of 6.7 at a depth of 35 km. This destructive earthquake occurred at 22:15 UTC and was recorded by several early seismographs. The shock was centered about 20 km southeast of Yalta and had a maximum perceived intensity of VIII (Damaging) on the Medvedev–Sponheuer–Karnik scale. Near the epicentral region, fishermen reported disturbance of the sea, with tidal gauges recording 53 cm on waves at Yevpatoria and 35 cm on waves in Yalta. Numerous, very large flames were seen offshore Sevastopol, Cape Lucullus, and Yalta in the early morning following the September event. Several types of fire and flame were described by witnesses. Pale flames were up to 2000 m wide and up to 500 m in height, and were visible for several minutes at a time. Other flames began with a whitish glow and became bright red; this style of flame sometimes burned for more than an hour. Bright flashes and explosions were also reported. The flames and explosions were attributed to methane or other hydrocarbon gasses that had been released from the seabed and spontaneously combusted in Phosphine (a self-igniting gas).http://www.searchanddiscovery.com/abstracts/html/2014/90194ice/abstracts/1948601.html Description and interpretation of the 1927 earthquakes and catastrophic methane outbursts offshore Crimea, northern Black Sea, by Soviet geoscientists D. Daudina G. Tari 2014 AAPG International Conference & Exhibition – The Spirit Between Continents: Energy Geosciences in a Changing World, September 14–17, 2014, Istanbul, Turkey, Search and Discovery Article #90194 American Association of Petroleum Geologists September 16 event An aftershock that was estimated to have a magnitude of 4.9 occurred on September 16 at 08:21 UTC. The shock was described as weak, but the sea receded at Balaklava Bay. See also 1901 Black Sea earthquake List of earthquakes in 1927 References 10.1007/BF02509653 Tsunami waves in the Black Sea in 1927: Observations and numerical modelling 1996 Dotsenko S. F. Konovalov A. V. Physical Oceanography 7 6 389–401 1996PhOce...7..389D 130574452 ISC-GEM Global Instrumental Earthquake Catalogue (1900–2009) http://www.isc.ac.uk/iscgem/index.php ISC 2014 International Seismological Centre Version 1.05 Significant Earthquake http://www.ngdc.noaa.gov/nndc/struts/results?eq_0=3330&t=101650&s=13&d=22,26,13,12&nd=display https://web.archive.org/web/20190227060508/https://www.ngdc.noaa.gov/nndc/struts/results?eq_0=3330&t=101650&s=13&d=22,26,13,12&nd=display dead February 27, 2019 National Geophysical Data Center External links 909503 Category:June 1927 in Europe Category:September 1927 in Europe 1927 Crimean Earthquakes Category:1927 disasters in the Soviet Union 1927 Crimean Category:1927 earthquakes Crimea Category:Disasters in the Black Sea Category:Disasters in Crimea Category:20th century in Crimea Category:Earthquakes in Russia Category:History of Yalta Category:History of Yevpatoria Category:History of Feodosia Category:History of Sevastopol