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 An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, from ...

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 (man) it, Siciliana (woman) , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = Ethnicity , demographics1_footnotes = , demographi ...

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...

to the

Levant The Levant () is an approximate historical geographical term referring to a large area in the Eastern Mediterranean region of Western Asia. In its narrowest sense, which is in use today in archaeology and other cultural contexts, it is eq ...

and

North Africa North Africa, or Northern Africa is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region, and it is sometimes defined as stretching from the Atlantic shores of Mauritania in ...

. On the

Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...

island of

Crete Crete ( el, Κρήτη, translit=, Modern: , Ancient: ) is the largest and most populous of the Greek islands, the 88th largest island in the world and the fifth largest island in the Mediterranean Sea, after Sicily, Sardinia, Cyprus, and ...

, the effects of the earthquake were cataclysmic, over 500 bodies were recovered in the city of

Heraklion Heraklion or Iraklion ( ; el, Ηράκλειο, , ) is the largest city and the administrative capital of the island of Crete and capital of Heraklion regional unit. It is the fourth largest city in Greece with a population of 211,370 (Urban A ...

. Shockwaves from the earthquake were felt intensely, covering all of the

Ottoman Empire The Ottoman Empire, * ; is an archaic version. The definite article forms and were synonymous * and el, Оθωμανική Αυτοκρατορία, Othōmanikē Avtokratoria, label=none * info page on book at Martin Luther University) ...

; present-day

Turkey Turkey ( tr, Türkiye ), officially the Republic of Türkiye ( tr, Türkiye Cumhuriyeti, links=no ), is a list of transcontinental countries, transcontinental country located mainly on the Anatolia, Anatolian Peninsula in Western Asia, with ...

Cyprus Cyprus ; tr, Kıbrıs (), officially the Republic of Cyprus,, , lit: Republic of Cyprus is an island country located south of the Anatolian Peninsula in the eastern Mediterranean Sea. Its continental position is disputed; while it is geo ...

and the

Middle East The Middle East ( ar, الشرق الأوسط, ISO 233: ) is a geopolitical region commonly encompassing Arabian Peninsula, Arabia (including the Arabian Peninsula and Bahrain), Anatolia, Asia Minor (Asian part of Turkey except Hatay Pro ...

where damage and human losses were reported. In

Malta Malta ( , , ), officially the Republic of Malta ( mt, Repubblika ta' Malta ), is an island country in the Mediterranean Sea. It consists of an archipelago, between Italy and Libya, and is often considered a part of Southern Europe. It lies ...

, the earthquake collapsed the

Għajn Ħadid Tower Għajn Ħadid Tower ( mt, Torri ta' Għajn Ħadid), originally known as ''Torre di Salomone'' and known by locals as Xagħra Tower ( mt, It-Torri tax-Xagħra), is a ruined watchtower in Selmun, limits of Mellieħa, Malta. It was built in 1658 as ...

—a coastal watchtower built around the year 1638. In

Cairo Cairo ( ; ar, القاهرة, al-Qāhirah, ) is the capital of Egypt and its largest city, home to 10 million people. It is also part of the largest urban agglomeration in Africa, the Arab world and the Middle East: The Greater Cairo metro ...

, Egypt, the earthquake destroyed buildings, created

seiche A seiche ( ) is a standing wave in an enclosed or partially enclosed body of water. Seiches and seiche-related phenomena have been observed on lakes, reservoirs, swimming pools, bays, harbors, caves and seas. The key requirement for formation o ...

s in canals, and killed several people. Off the Egyptian and

Italian Italian(s) may refer to: * Anything of, from, or related to the people of Italy over the centuries ** Italians, an ethnic group or simply a citizen of the Italian Republic or Italian Kingdom ** Italian language, a Romance language *** Regional Ita ...

coasts, sailors reported feeling a

seaquake 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 ...

Tectonic background

Along the southern coast of the

Dodecanese Islands The Dodecanese (, ; el, Δωδεκάνησα, ''Dodekánisa'' , ) are a group of 15 larger plus 150 smaller Greek islands in the southeastern Aegean Sea and Eastern Mediterranean, off the coast of Turkey's Anatolia, of which 26 are inhabited. ...

Rhodes Rhodes (; el, Ρόδος , translit=Ródos ) is the largest and the historical capital of the Dodecanese islands of Greece. Administratively, the island forms a separate municipality within the Rhodes regional unit, which is part of the So ...

, Crete and the Ionian Islands, the

African Plate The African Plate is a major tectonic plate that includes much of the continent of Africa (except for its easternmost part) and the adjacent oceanic crust to the west and south. It is bounded by the North American Plate and South American Plat ...

made of oceanic crust is

subducting Subduction is a geological process in which the oceanic lithosphere is recycled into the Earth's mantle at convergent boundaries. Where the oceanic lithosphere of a tectonic plate converges with the less dense lithosphere of a second plate, the ...

beneath the

Aegean Sea Plate The Aegean Sea Plate (also called the Hellenic Plate or Aegean Plate) is a small tectonic plate located in the eastern Mediterranean Sea under southern Greece and western Turkey. Its southern edge is the Hellenic subduction zone south of Crete, ...

(part of the

Eurasian Plate The Eurasian Plate is a tectonic plate that includes most of the continent of Eurasia (a landmass consisting of the traditional continents of Europe and Asia), with the notable exceptions of the Indian subcontinent, the Arabian subcontinent and ...

) along a

convergent plate boundary A convergent boundary (also known as a destructive boundary) is an area on Earth where two or more lithospheric plates collide. One plate eventually slides beneath the other, a process known as subduction. The subduction zone can be defined by a ...

at a rate of 5 to 10 mm/yr. The interface of the subduction zone occasionally ruptures in large

megathrust earthquake Megathrust earthquakes occur at convergent plate boundaries, where one tectonic plate is forced underneath another. The earthquakes are caused by slip along the thrust fault that forms the contact between the two plates. These interplate earthqua ...

s such as those in 365 and

1303 Year 1303 ( MCCCIII) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. Events By place Byzantine Empire * September – Emperor Andronikos II (Palaiologos) facing a possible sieg ...

. Tsunamis are produced along the

Hellenic Trench The Hellenic Trench (HT) is an oceanic trough located in the forearc of the Hellenic Arc, an arcuate archipelago on the southern margin of the Aegean Sea Plate, or Aegean Plate, also called Aegea, the basement of the Aegean Sea. The HT begins i ...

as one side of the fault is suddenly thrust upwards, displacing trillions of gallons of seawater during a massive earthquake.

Earthquake

The Heraklion earthquake of 1856 was an intermediate-depth earthquake with a

hypocenter In seismology, a hypocenter or hypocentre () is the point of origin of an earthquake or a subsurface nuclear explosion. A synonym is the focus of an earthquake. Earthquakes An earthquake's hypocenter is the position where the strain energy s ...

depth of 60 to 90 km, occurring on a fault within the subducting

. The epicenter is most likely located off the northern coast of Crete, based on evaluating where the strongest isoseismic contours were. For a moment magnitude 7.7 () event, the estimated fault dimensions is 64 km × 64 km at a depth of 90 km beneath the

Aegean Sea The Aegean Sea ; tr, Ege Denizi (Greek language, Greek: Αιγαίο Πέλαγος: "Egéo Pélagos", Turkish language, Turkish: "Ege Denizi" or "Adalar Denizi") is an elongated embayment of the Mediterranean Sea between Europe and Asia. It ...

while an 8.1–8.3 would involve a 120 km × 120 km fault rupture at a deeper depth of 130 km.

Effects

The earthquake caused widespread damage not just in Greece, but in the

and

, where additional deaths and damage was reported. An exact time of occurrence is still debated between 02:38 am or 02:45 am.

Greece

The earthquake reached XI (''Extreme'') on the

Mercalli intensity scale The Modified Mercalli intensity scale (MM, MMI, or MCS), developed from Giuseppe Mercalli's Mercalli intensity scale of 1902, is a seismic intensity scale used for measuring the intensity of shaking produced by an earthquake. It measures the eff ...

in the central part of Crete. The city of

was almost destroyed, with only 18 or 40 of the 3,600 houses left standing. The seaside cities of

Sitia Sitia ( el, Σητεία) is a port town and a municipality in Lasithi, Crete, Greece. The town has 9,912 inhabitants (2011) and the municipality has 18,318 (2011). It lies east of Agios Nikolaos and northeast of Ierapetra. Sitia port is on the ...

and

Chania Chania ( el, Χανιά ; vec, La Canea), also spelled Hania, is a city in Greece and the capital of the Chania regional unit. It lies along the north west coast of the island Crete, about west of Rethymno and west of Heraklion. The muni ...

were also severely damaged. A total of 538 inhabitants of Crete were killed while 637 persons were injured. On the island of

, several villages were destroyed and the coast experienced uplift. Ground failures were widely observed amidst the destruction. Sixty people died on the island. The island of

Thera Santorini ( el, Σαντορίνη, ), officially Thira (Greek language, Greek: Θήρα ) and classical Greek Thera (English language, English pronunciation ), is an island in the southern Aegean Sea, about 200 km (120 mi) southeast ...

also reported some damage. In

Kasos Kasos (; el, Κάσος, ), also Casos, is a Greek island municipality in the Dodecanese. It is the southernmost island in the Aegean Sea, and is part of the Karpathos regional unit. The capital of the island is Fri. , its population was 1,22 ...

and

Karpathos Karpathos ( el, Κάρπαθος, ), also Carpathos, is the second largest of the Greek Dodecanese islands, in the southeastern Aegean Sea. Together with the neighboring smaller Saria Island it forms the municipality of Karpathos, which is part o ...

, 8,000 homes were wiped-out, and there were 20 deaths. On mainland Greece, the earthquake was felt in the cities of

Ioannina Ioannina ( el, Ιωάννινα ' ), often called Yannena ( ' ) within Greece, is the capital and largest city of the Ioannina regional unit and of Epirus, an administrative region in north-western Greece. According to the 2011 census, the c ...

and

Kyparissia Kyparissia ( el, Κυπαρισσία) is a town and a former municipality in northwestern Messenia, Peloponnese, Greece. Since the 2011 local government reform it is part of the municipality Trifylia, of which it is the seat and a municipal unit. ...

Malta

In the

Maltese Islands Malta ( , , ), officially the Republic of Malta ( mt, Repubblika ta' Malta ), is an island country in the Mediterranean Sea. It consists of an archipelago, between Italy and Libya, and is often considered a part of Southern Europe. It lies ...

, the earthquake was felt much stronger than most earthquakes from Greece when felt on the islands, making this very unusual and of interest to many seismologists. The quake disrupted the night and woke everyone on the island. The shaking lasted between 22 and 60 seconds, causing many residents to lose their balance and threw down many items in houses. Large cracks developed in the homes of some places such as

Valletta Valletta (, mt, il-Belt Valletta, ) is an Local councils of Malta, administrative unit and capital city, capital of Malta. Located on the Malta (island), main island, between Marsamxett Harbour to the west and the Grand Harbour to the east, i ...

and Gozo Region. Many churches had cracks in the walls and domes and had hanging crucifixes falling off. In some cases, the damage was more serious, some churches experiencing a total collapse. The dome of Saint Paul's Cathedral in Mdina collapsed from the inside, which caused some £1,000 in damages. Another church, the Carmelite Church, had its

steeple In architecture, a steeple is a tall tower on a building, topped by a spire and often incorporating a belfry and other components. Steeples are very common on Christian churches and cathedrals and the use of the term generally connotes a religi ...

rebuilt because the earthquake had damaged it so severely. Damage to structures corresponded to intensity VII, higher than expected for the 1,000 km distance from the earthquake in Greece. A typical earthquake should only be felt with intensities IV–V. The occurrence of very strong shaking is likely attributed to

long period ground motion Long period ground motion is ground movement during an earthquake with a period longer than 1 second. The frequency of such waves is 1 Hz or lower, placing them in the infrasonic part of the audio spectrum. See also *Love wave *S-wave *P-wave * ...

. It was this earthquake that collapsed the

. An eyewitness present at the tower one month before the earthquake said large cracks opened in the ground around the tower.

Egypt

, the shaking was still perceivable and strong enough to cause damage. Shaking intensity in the

Egyptian Egyptian describes something of, from, or related to Egypt. Egyptian or Egyptians may refer to: Nations and ethnic groups * Egyptians, a national group in North Africa ** Egyptian culture, a complex and stable culture with thousands of years of ...

capital reached VII–VIII. Three distinct shocks were felt with durations between one and two minutes. Twenty homes collapsed and another 200 were affected, while some 20 mosques were also crippled.

Seiches A seiche ( ) is a standing wave in an enclosed or partially enclosed body of water. Seiches and seiche-related phenomena have been observed on lakes, reservoirs, swimming pools, bays, harbors, caves and seas. The key requirement for formation ...

in canals caused water to splash all over while clocks stopped working as a result of the ground motions. At least ten people died in the city. Following the aftermath, many survivors slept outside their homes for fear of a collapse during the night for several days. In

Alexandria Alexandria ( or ; ar, ٱلْإِسْكَنْدَرِيَّةُ ; grc-gre, Αλεξάνδρεια, Alexándria) is the second largest city in Egypt, and the largest city on the Mediterranean coast. Founded in by Alexander the Great, Alexandria ...

, only some old construction fell but there were no major implications to the city. Two people were killed and some injuries were sustained to people. Around the

Nile Delta The Nile Delta ( ar, دلتا النيل, or simply , is the delta formed in Lower Egypt where the Nile River spreads out and drains into the Mediterranean Sea. It is one of the world's largest river deltas—from Alexandria in the west to Po ...

, collapses of homes and falling

minaret A minaret (; ar, منارة, translit=manāra, or ar, مِئْذَنة, translit=miʾḏana, links=no; tr, minare; fa, گل‌دسته, translit=goldaste) is a type of tower typically built into or adjacent to mosques. Minarets are generall ...

s killed an additional number of people in the towns of

Tanta Tanta ( ar, طنطا ' , ) is a city in Egypt with the country's fifth largest populated area and 658,798 inhabitants as of 2018. Tanta is located between Cairo and Alexandria: north of Cairo and southeast of Alexandria. The capital of Gharbia ...

and

Damanhur Damanhur ( ar, دمنهور ', ; Egyptian: ''Dmỉ-n-Ḥr.w''; cop, ⲡϯⲙⲓⲛ̀ϩⲱⲣ '; ; grc, Ἑρμοῦ πόλις μικρά ') is a city in Lower Egypt, and the capital of the Beheira Governorate. It is located northwest of Cair ...

. In other parts of the delta, many residents found it difficult to stand, which terrified many. Ground motions were strong enough to shift furniture and cause water in tanks to slosh around. Sailors off the coasts reported feeling the strong earthquake as well.

Elsewhere

Shaking was also felt in

Syracuse Syracuse may refer to: Places Italy *Syracuse, Sicily, or spelled as ''Siracusa'' *Province of Syracuse United States *Syracuse, New York **East Syracuse, New York **North Syracuse, New York *Syracuse, Indiana * Syracuse, Kansas *Syracuse, Miss ...

and

Pozzallo Pozzallo ( scn, Puzzaddu) is a town and ''comune'' in the province of Ragusa, Sicily, southern Italy. Pozzallo is now a major summer tourist destination: as of March 2020, two beaches in Pozzallo hold a Blue Flag award, presented by the FEE ...

Sicily (man) it, Siciliana (woman) , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = Ethnicity , demographics1_footnotes = , demographi ...

, Italy where some minor damage occurred. The shock also caused damage to places like

Syria Syria ( ar, سُورِيَا or سُورِيَة, translit=Sūriyā), officially the Syrian Arab Republic ( ar, الجمهورية العربية السورية, al-Jumhūrīyah al-ʻArabīyah as-Sūrīyah), is a Western Asian country loc ...

and

Palestine __NOTOC__ Palestine may refer to: * State of Palestine, a state in Western Asia * Palestine (region), a geographic region in Western Asia * Palestinian territories, territories occupied by Israel since 1967, namely the West Bank (including East ...

. Eyewitnesses along the coasts of

Haifa Haifa ( he, חֵיפָה ' ; ar, حَيْفَا ') is the third-largest city in Israel—after Jerusalem and Tel Aviv—with a population of in . The city of Haifa forms part of the Haifa metropolitan area, the third-most populous metropol ...

and

Lebanon Lebanon ( , ar, لُبْنَان, translit=lubnān, ), officially the Republic of Lebanon () or the Lebanese Republic, is a country in Western Asia. It is located between Syria to the north and east and Israel to the south, while Cyprus li ...

reported a small "tsunami" wave. Effects from the earthquake was felt in the entire

Adriatic Sea The Adriatic Sea () is a body of water separating the Italian Peninsula from the Balkan Peninsula. The Adriatic is the northernmost arm of the Mediterranean Sea, extending from the Strait of Otranto (where it connects to the Ionian Sea) to t ...

region and Cyprus.

Legacy

In the book ''Domestic Life in Palestine'', author Mary Eliza Rogers described her experience of the strong tremors in

, Israel but she dated the event incorrectly between the night of 10 and 11 October.

References

{{Earthquakes in the Levant Earthquakes in Greece Earthquakes in Malta Earthquakes in Turkey Earthquakes in the Middle East Earthquakes in Egypt Earthquakes in Israel Earthquakes in Syria 1856 earthquakes 1856 disasters in Europe 1856 in Greece 1856 in the Ottoman Empire Earthquakes in the Levant Earthquakes in Crete 1856 disasters in Asia 1856 disasters in Africa 1856 disasters in the Ottoman Empire