1999 Athens earthquake

Tectonic setting

Greece is a seismically active country, located in a complex zone of interaction of the African, Eurasian, Aegean Sea, and Anatolian plates. Southern Greece itself is located on the Aegean Sea plate. The Anatolian Plate is moving southwest into the Aegean Sea plate at a rate of 3 cm per year relative to the Eurasian plate. Meanwhile, the African plate subduction beneath the Aegean Sea plate at a rate of 4 cm per year along the Hellenic Subduction Zone.

Damage

The quake began in the afternoon of 7 September 1999. It was the most devastating and costly natural disaster to hit the country in nearly 20 years. The last major earthquake to hit Athens took place on February 24, 1981, near the Alkyonides Islands of the Corinthian Gulf, some 87 km to the west of the Greek capital. Registering a moment magnitude of 6.7, the 1981 earthquake had resulted in the deaths of 20 people and considerable and widespread structural damage in the city of Corinth, nearby towns and sections of Athens' western suburbs.

Apart from the proximity of the epicenter to the Athens Metropolitan Area, this quake also featured a very shallow hypocenter combined with unusually high ground accelerations. Unexpectedly heavy damage also affected the town of Adames. The Acropolis of Athens and the rest of the city's famous ancient monuments escaped the disaster either totally unharmed or suffering only minor damage. A landslide as well as several fissures were reported along the road leading to the peak of Mount Parnitha. Regency Casino Mont Parnes was damaged by the earthquake, causing numerous rooms to collapse and the building's northeastern wing to detach from rest of the building. Minor damage was also reported to water and waste networks close to the epicenter.

Strong motion

This event took Greek seismologists by surprise as it came from a previously unknown fault, originating in an area that was for a long time considered of a particularly low seismicity. The highest recorded peak ground acceleration was 0.3g, at 15 km from the epicentre, with attenuation predicting 0.6g acceleration at the centre.

Response

The tremor took place less than a month after a Turkish disaster which was much larger in scale. This succession of earthquakes and mutual help of both countries gave rise to talks about what became known as the "Greek-Turkish earthquake diplomacy", in hopes for a breakthrough in bilateral relations, which had been marred by decades of hostility. Turkey reciprocated the aid rendered by Greece immediately following the August 17, 1999 Turkish earthquake. A special taskforce was formed, consisting of the Undersecretariat of the Prime Ministry, the Turkish Armed Forces, the Ministries of Foreign Affairs and of Internal Affairs and the Greek Embassy in Ankara was contacted. The Turkish aid was the first to arrive in the affected areas, with the first 20-person rescue team arriving in Athens within 13 hours after the earthquake struck. The Greek consulates and the embassy in Turkey had their phone lines jammed with Turkish citizens offering blood donations.

References

Sources

• Br J Surg. 2004 Dec;91(12):1633–40. Autopsy findings from 111 deaths in the 1999 Athens earthquake as a basis for auditing the emergency response. Papadopoulos IN1, Kanakaris N, Triantafillidis A, Stefanakos J, Kainourgios A, Leukidis C.

References

1. "The Athens (Greece) Earthquake of September 7, 1999: Preliminary Report on Strong Motion Data and Structural Response.".
2. (2015). "Open-File Report". United States Geological Survey.
3. (2009). "Palaeoseismology: Historical and Prehistorical Records of Earthquake Ground Effects for Seismic Hazard Assessment".
4. (2004). "Time Out Athens". [[Penguin Books]].
5. Maria Thermou. (November 25, 2008). "Η ανάσταση του Μον Παρνές".
6. Elenas, A.. (2003). "Athens earthquake of 7 September 1999: Intensity measures and observed damages". Indian Society of Earthquake Technology.
7. Anastasiadis A. N.. "The Athens (Greece) Earthquake of September 7, 1999: Preliminary Report on Strong Motion Data and Structural Response". MCEER.
8. [http://www.milliyet.com.tr/1999/09/10/haber/hab00.html "Bu dostluk bitmez"] {{in lang. tr
9. ISC. (2017). "ISC-GEM Global Instrumental Earthquake Catalogue (1900–2013)". [[International Seismological Centre]].
10. National Geophysical Data Center / World Data Service (NGDC/WDS). (1972). "Significant Earthquake Database". [[National Geophysical Data Center]], [[National Oceanic and Atmospheric Administration.
11. (September 4, 2009). "PAGER-CAT Earthquake Catalog". United States Geological Survey.