The 1927 Crimean earthquakes occurred in the month of June and again in September in the waters of the

Black Sea The Black Sea is a marginal mediterranean sea of the Atlantic Ocean lying between Europe and Asia, east of the Balkans, south of the East European Plain, west of the Caucasus, and north of Anatolia. It is bounded by Bulgaria, Georgia, Rom ...

near the

Crimea Crimea, crh, Къырым, Qırım, grc, Κιμμερία / Ταυρική, translit=Kimmería / Taurikḗ ( ) is a peninsula in Ukraine, on the northern coast of the Black Sea, that has been occupied by Russia since 2014. It has a pop ...

n Peninsula. Each of the

submarine earthquake A submarine, undersea, or underwater earthquake is an earthquake that occurs underwater at the bottom of a body of water, especially an ocean. They are the leading cause of tsunamis. The magnitude can be measured scientifically by the use of the ...

s in the sequence triggered

tsunami A tsunami ( ; from ja, 津波, lit=harbour wave, ) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater exp ...

. The June event was moderate relative to the large

September 11 Events Pre-1600 * 9 – The Battle of the Teutoburg Forest ends: The Roman Empire suffers the greatest defeat of its history and the Rhine is established as the border between the Empire and the so-called barbarians for the next four hu ...

event, which had at least one aftershock that also generated a tsunami. Following the large September event,

natural gas Natural gas (also called fossil gas or simply gas) is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane in addition to various smaller amounts of other higher alkanes. Low levels of trace gases like carbo ...

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

along the coast. The shock occurred at a depth of 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 The Medvedev–Sponheuer–Karnik scale, also known as the MSK or MSK-64, is a macroseismic intensity scale used to evaluate the severity of ground shaking on the basis of observed effects in an area where an earthquake transpires. The scale was f ...

Tide gauge A tide gauge is a device for measuring the change in sea level relative to a vertical datum. It its also known as mareograph, marigraph, sea-level recorder and limnimeter. When applied to freshwater continental water bodies, the instrument ma ...

stations recorded waves with a maximum amplitude of at Yalta, at

Yevpatoria Yevpatoria ( uk, Євпаторія, Yevpatoriia; russian: Евпатория, Yevpatoriya; crh, , , gr, Ευπατορία) is a city of regional significance in Western Crimea, north of Kalamita Bay. Yevpatoria serves as the administrativ ...

, and at

Feodosia uk, Феодосія, Теодосія crh, Kefe , official_name = () , settlement_type= , image_skyline = THEODOSIA 01.jpg , imagesize = 250px , image_caption = Genoese fortress of Caffa , image_shield = Fe ...

September 11 event

The September event struck the Crimean Peninsula with a

moment magnitude The moment magnitude scale (MMS; denoted explicitly with or Mw, and generally implied with use of a single M for magnitude) is a measure of an earthquake's magnitude ("size" or strength) based on its seismic moment. It was defined in a 1979 pape ...

of 6.7 at a depth of . This destructive earthquake occurred at 22:15 UTC and was recorded by several early seismographs. The shock was centered about southeast of Yalta and had a maximum perceived intensity of VIII (''Damaging'') on the

. Near the epicentral region, fishermen reported disturbance of the sea, with tidal gauges recording waves at Yevpatoria and waves in Yalta. Numerous, very large flames were seen offshore

Sevastopol Sevastopol (; uk, Севасто́поль, Sevastópolʹ, ; gkm, Σεβαστούπολις, Sevastoúpolis, ; crh, Акъя́р, Aqyár, ), sometimes written Sebastopol, is the largest city in Crimea, and a major port on the Black Sea ...

, Cape Lucullus, and

Yalta Yalta (: Я́лта) is a resort city on the south coast of the Crimean Peninsula surrounded by the Black Sea. It serves as the administrative center of Yalta Municipality, one of the regions within Crimea. Yalta, along with the rest of Cri ...

in the early morning following the September event. Several types of fire and flame were described by witnesses. Pale flames were up to wide and up to 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 Methane ( , ) is a chemical compound with the chemical formula (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas. The relative abundance of methane on Ea ...

or other hydrocarbon gasses that had been released from the

seabed The seabed (also known as the seafloor, sea floor, ocean floor, and ocean bottom) is the bottom of the ocean. All floors of the ocean are known as 'seabeds'. The structure of the seabed of the global ocean is governed by plate tectonics. Most of ...

and spontaneously combusted in

Phosphine Phosphine (IUPAC name: phosphane) is a colorless, flammable, highly toxic compound with the chemical formula , classed as a pnictogen hydride. Pure phosphine is odorless, but technical grade samples have a highly unpleasant odor like rotting ...

(a self-igniting gas).

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.

References

External links

* {{DEFAULTSORT:Crimean Earthquakes 1927 Crimean Earthquakes 1927 in the Soviet Union 1927 Crimean 1927 earthquakes

History of the Black Sea Disasters in Crimea 1927 disasters in the Soviet Union

June 26 event

September 11 event

September 16 event

See also

References

External links