An earthquake – also called a quake, tremor, or temblor – is the shaking of the Earth's surface resulting from a sudden release of energy in the lithosphere that creates seismic waves. Earthquakes can range in intensity, from those so weak they cannot be felt, to those violent enough to propel objects and people into the air, damage critical infrastructure, and wreak destruction across entire cities. The seismic activity of an area is the frequency, type, and size of earthquakes experienced over a particular time. The seismicity at a particular location in the Earth is the average rate of seismic energy release per unit volume.
Year 991 (CMXCI) was a common year starting on Thursday of the Julian calendar.
Year 542 (DXLII) was a common year starting on Wednesday of the Julian calendar. From this year forward, the appointment of particular Roman consuls was abandoned and the office was merged with that of Byzantine emperor. Thus, the consular year dating was abandoned in practice, even though it formally remained until the end of the 9th century. The denomination 542 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
The 1999 İzmit earthquake was a magnitude 7.6 earthquake which struck the Kocaeli Province of Turkey on 17 August 1999. Between 17,127 and 18,373 people died as a result, and it caused an estimated US $6.5 billion in damage. It was named for the quake's proximity to the northwestern city of İzmit. The earthquake occurred at 03:01 local time at a shallow depth of 15 km. A maximum Mercalli intensity of X (Extreme) was observed. The earthquake lasted for 37 seconds, causing seismic damage, and is widely remembered as one of the deadliest natural disasters in modern Turkish history.
The 1509 Constantinople earthquake or historically Kıyamet-i Sugra occurred in the Sea of Marmara on 10 September 1509 at about 22:00. The earthquake had an estimated magnitude of 7.2 ± 0.3 on the surface-wave magnitude scale. A tsunami and 45 days of aftershocks followed the earthquake. The death toll of this earthquake is poorly known; estimates range between 1,000 and 13,000.
The 1693 Sicily earthquake struck parts of southern Italy near Sicily, Calabria, and Malta on 11 January at around 21:00 local time. This earthquake was preceded by a damaging foreshock on 9 January. The main quake had an estimated magnitude of 7.4 on the moment magnitude scale, the most powerful in Italian recorded history, and a maximum intensity of XI (Extreme) on the Mercalli intensity scale, destroying at least 70 towns and cities, seriously affecting an area of 5,600 square kilometres (2,200 sq mi) and causing the death of about 60,000 people.
A devastating earthquake known in scientific literature as the Earthquake of 749 struck on January 18, 749, in areas of the Umayyad Caliphate, with the epicenter in Galilee. The most severely affected areas were West and East of the Jordan River. The cities of Tiberias, Beit She'an, Pella, Gadara, and Hippos were largely destroyed while many other cities across the Levant were heavily damaged. The casualties numbered in the tens of thousands.
The 1222 Cyprus earthquake occurred at about 06:15 UTC on 11 May. It had an estimated magnitude of 7.0–7.5 and triggered a paleotsunami that was recorded in Libya and Alexandria. The strongest shaking was felt in Nicosia, Limassol and Paphos. Many people died, although there are no estimates for the total number of casualties.
Seismic risk in Malta is considered to be low with little historic damage noted and no known victims. The archipelago is however in a potentially significant seismic zone and the risk to the population is probably undervalued.
The 991 Damascus earthquake took place in the city of Damascus on 5 April, 991.
The 957 Caspian Sea earthquake took place in the Caspian Sea and its vicinity in 957.
The 881 Acre earthquake took place in the vicinity of Acre in 881. Alexandria was reportedly affected by the same earthquake.
The 859 Syrian coast earthquake affected the Mediterranean coast of Syria in the year 859 or 860 CE. It caused almost the complete destruction of Latakia and Jableh, major damage at Antioch and led to many deaths.
The 803 Mopsuestia earthquake took place in the vicinity of Mopsuestia and the Gulf of Alexandretta (İskenderun) in 802 or 803 CE.
The 554 Anatolia earthquake took place on August 15, 554 in the southwest coasts of Anatolia. It affected the Güllük Gulf, and the island of Kos.
The 551 Malian Gulf earthquake took place in the Spring of 551 in the vicinity of the Malian Gulf. It affected the cities of Echinus and Tarphe.
The 542 Sea of Marmara earthquake took place in the winter of 542 in the vicinity of the Sea of Marmara. It also affected the coasts of Thrace and the Edremit Gulf. The earthquake affected the eastern Roman empire during the reign of the emperor Justinian I.
The 684 Hakuho earthquake took place in Japan in 684, and is described in the history book Nihon Shoki from the 8th century. The earthquake took place on 26 November 684, in 13th year of the reign of Emperor Tenmu. It caused the under-sea inundation of approximately 10 km2 (3.9 sq mi) of rice fields.
The area around Constantinople was affected by a major earthquake in AD 447. It caused serious damage to the recently completed Theodosian Walls in Constantinople, destroying 57 towers and large stretches of the walls. The historical records contain no mention of casualties directly associated with this earthquake, although many thousands of people were reported to have died in the aftermath due to starvation and a "noxious smell".
The 1856 Heraklion earthquake, also known as the Crete earthquake or Rhodes earthquake, occurred on the morning of October 12 at 02:45 am local time. This extremely catastrophic earthquake had an estimated magnitude of 7.7 to 8.3 at a depth of approximately 61 to 100 km. The earthquake was felt over a very wide area extending from Sicily, Italy to the Levant and North Africa. On the Greek island of Crete, the effects of the earthquake were cataclysmic, over 500 bodies were recovered in the city of Heraklion. Shockwaves from the earthquake were felt intensely, covering all of the Ottoman Empire; present-day Turkey, Cyprus and the Middle East where damage and human losses were reported. In Malta, the earthquake collapsed the Għajn Ħadid Tower—a coastal watchtower built around the year 1638. In Cairo, Egypt, the earthquake destroyed buildings, created seiches in canals, and killed several people. Off the Egyptian and Italian coasts, sailors reported feeling a seaquake.
