1999 Athens earthquake

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1999 Athens earthquake
Greece relief location map.jpg
Bullseye1.png
UTC  time1999-09-07 11:56:51
ISC  event 1655758
USGS-ANSS ComCat
Local dateSeptember 7, 1999 (1999-09-07)
Local time14:56:51 EEST
Magnitude6.0 Mw [1]
Depth10.0 km (6.2 mi) [1]
Epicenter 38°04′N23°31′E / 38.06°N 23.51°E / 38.06; 23.51 [1]
Type Normal-slip [2]
Areas affected Greece
Total damage$3–4.2 billion [3] [4]
Max. intensity IX (Violent) [3]
Peak acceleration0.6 g [5]
Casualties143 dead, 800–1,600 injured [3] [4]
50,000 homeless [2]
Ricomex industry (Vileda) Ricomex 1.jpg
Ricomex industry (Vileda)
Ricomex industry (Vileda) monument Ricomex 3.jpg
Ricomex industry (Vileda) monument
IDF relief mission, September 1999 1999 Athens earthquake relief by IDF (FB808729829170744).jpg
IDF relief mission, September 1999

The 1999 Athens earthquake occurred on September 7 at 14:56:51 local time near Mount Parnitha in Greece with a moment magnitude of 6.0 and a maximum Mercalli intensity of IX (Violent). The proximity to the Athens metropolitan area resulted in widespread structural damage, mainly to the nearby suburban towns of Ano Liosia, Acharnes, Fyli, Thrakomakedones, Kifissia, Metamorfosi, Kamatero and Nea Filadelfeia. More than 100 buildings (including three major factories) across those areas collapsed trapping scores of victims under their rubble while dozens more were severely damaged. With damage estimated at $3–4.2 billion, 143 people were killed, and up to 1,600 were treated for injuries in Greece's deadliest natural disaster in almost half a century.

Contents

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. [6]

Damage

The 1999 quake 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. [7]

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. Minor damage was also reported to water and waste networks close to the epicenter. [4]

Strong motion

Rescue in Ano Liosia 7 September 1999. 1999 Seismos Parnethas sta Ano Liosia.png
Rescue in Ano Liosia 7 September 1999.

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. [8]

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. [9]

See also

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References

  1. 1 2 3 ISC (2017), ISC-GEM Global Instrumental Earthquake Catalogue (1900–2013), Version 4.0, International Seismological Centre
  2. 1 2 USGS (September 4, 2009), PAGER-CAT Earthquake Catalog, Version 2008_06.1, United States Geological Survey
  3. 1 2 3 National Geophysical Data Center / World Data Service (NGDC/WDS) (1972), Significant Earthquake Database (Data Set), National Geophysical Data Center, NOAA, doi:10.7289/V5TD9V7K
  4. 1 2 3 Elenas, A. (2003), "Athens earthquake of 7 September 1999: Intensity measures and observed damages" (PDF), ISET Journal of Earthquake Technology, Technical Note, Indian Society of Earthquake Technology, 49 (1): 77–97
  5. ↑ Anastasiadis, A.N.; Demosthenous, M.; Karakostas, C.H.; Klimis, N.; Lekidis, B.; Margaris, B.; Papaioannou, C.H.; Papazachos, C.; Theodulidis, N. "The Athens (Greece) Earthquake of September 7, 1999: Preliminary Report on Strong Motion Data and Structural Response". MCEER: Earthquake Engineering to Extreme Events. Archived from the original on August 26, 2018.
  6. ↑ Matthew W. Herman; Gavin P. Hayes; Gregory M. Smoczyk; Rebecca Turner; Bethan Turner; Jennifer Jenkins; Sian Davies; Amy Parker; Allison Sinclair; Harley M. Benz; Kevin P. Furlong; Antonio Villaseñor (2015). "Seismicity of the Earth 1900‒2013 Mediterranean Sea and vicinity" (Open-File Report 2010-1083-Q). earthquake.usgs.gov. Open-File Report. USGS. doi: 10.3133/ofr20101083Q . Retrieved 11 August 2021.
  7. ↑ Papanikolaou, I.D.; Papanikolaou, D.I.; Lekkas, E.L. (2009). "Advances and limitations of the Environmental Seismic Intensity scale (ESI 2007) regarding near-field and far-field effects from recent earthquakes in Greece: implications for the seismic hazard assessment". In Reicherter, K.; Michetti, A.M.; Silva, P.G. (eds.). Palaeoseismology: Historical and Prehistorical Records of Earthquake Ground Effects for Seismic Hazard Assessment. Geological Society, Special Publications. Vol. 316. pp. 11–30. doi:10.1144/SP316.2. ISBN   9781862392762. S2CID   130603646.
  8. ↑ Anastasiadis A. N.; et al. "The Athens (Greece) Earthquake of September 7, 1999: Preliminary Report on Strong Motion Data and Structural Response". Institute of Engineering Seismology and Earthquake Engineering. MCEER. Archived from the original on 3 March 2016. Retrieved 22 March 2011.
  9. ↑ "Bu dostluk bitmez" (in Turkish)

Sources

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