1638 Calabrian earthquakes

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1638 Calabria earthquakes
Relief map of Italy Calabria.png
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March 27
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March 28
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March 28
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June 9
Local dateMarch 27, 1638 (1638-03-27)
Local time20:00 to 21:00
MagnitudeMw 6.8–7.1 (March 27)
Depth15 km (9 mi)
Epicenter 38°38′N15°47′E / 38.64°N 15.78°E / 38.64; 15.78
Areas affected Calabria, Kingdom of Naples (present-day Italy)
Max. intensity MMI XI (Extreme) [1]
TsunamiUncertain
Casualties9,581–30,000 [1] [2]

A series of mainshocks struck Calabria on March 27–28 and June 9, 1638. The first three earthquakes had moment magnitudes estimated to be Mw 6.6–7.1. [3] On June 9, another mainshock estimated at Mw 6.7 struck the same region, causing further damage and casualties. The four earthquakes resulted in as many as 30,000 fatalities.

Contents

Tectonic setting

Major faults associated with the Siculo-Calabrian rift Siculo-Calabrian Rift.png
Major faults associated with the Siculo-Calabrian rift

The region of Calabria is located between the Tyrrhenian and Ionian Seas, where active extension is ongoing. Extension is accommodated by normal faults on the Tyrrhenian side in Calabria. The trend of normal faults extend southwards to the Strait of Messina, where they occur on the Ionian side in Sicily. Known as the Siculo-Calabrian rift, this active geological feature is characterized by its high seismicity of earthquakes up to Mw 7.1. [2]

Geology

Historical documents suggests three large earthquakes occurred between March 27 and 28. The earthquake of March 27 occurred within the Crati Valley fault system, with the Piano Lago and Savuto–Decollatura faults as possible sources. The March 28 earthquakes ruptured the Mesima fault system and Santa Eufemia–Feroleto fault. However, no proper studies have been undertaken to conclusively identify the faults responsible for the June earthquakes. [4]

The Lake Fault, which produced a surface rupture, was responsible for the June 9 earthquake, based on rich historical documentation and paleoseismology. This normal fault dips at an angle to the west and offsets the surface vertically. Two slightly weaker earthquakes struck the same region in 1832 and 1836. [4] The June 9 earthquake caused a large surface-fault rupture measuring 96.6 km (60.0 mi) long and 0.8 m (2 ft 7 in) tall. The fault rupture was visible, extending from Petilia Policastro to Sila, near the eastern shore of Ampollino Lake. [5]

Summary of events

Based on analysis of the first-hand documentation, historiography and literary works during the 17th century, three mainshocks were identified: one on March 27 and two on March 28. [4] Italy's National Institute of Geophysics and Volcanology only identified two mainshocks in their catalogue.

LocationDateTimeCoordinatesMagnitude (Mw)Magnitude (Me, INGV)Intensity (MMI)
Savuto ValleyMarch 2710:00 39°07′N16°16′E / 39.11°N 16.27°E / 39.11; 16.27 6.8–7.17.0 [6] XI
Serre CalabresiMarch 28"day" 38°41′N16°14′E / 38.68°N 16.23°E / 38.68; 16.23 6.6-X
Santa Eufemia plainMarch 28"day" 38°58′N16°16′E / 38.96°N 16.26°E / 38.96; 16.26 6.6-XI
La Sila plateauJune 9"evening" 39°13′N16°34′E / 39.22°N 16.57°E / 39.22; 16.57 6.76.9 [7] X–XI

Damage and casualties

The official number of deaths stood at 9,571, including 6,811 in Calabria Citeriore and 2,760 in Calabria Ulteriore. The total number of dead was likely higher as these figures did not account for the many deaths that occurred in the months following the first earthquake due to injuries and deprevation. [8]

On March 27, at 22:00, the first and most destructive earthquake struck with an epicenter in the Savuto Valle or near the upper Crati River. It reached a maximum Modified Mercalli intensity level of XI (Extreme) in the heavily populated communes of Martirano, Rogliano, Santo Stefano di Rogliano, Grimaldi, Motta Santa Lucia, Marzi and Carpanzano. The earthquake destroyed much of the settlements in those towns. The town of Amantea suffered total damage, while minor damage was reported at Maratea and Reggio Calabria. According to Ettore Capecelatro, a jurist and official of the Kingdom of Naples, more than 10,000 homes were destroyed, while another 3,000 were rendered unsafe for habitation. [9] Luca Cellesi, the bishop of the Roman Catholic Diocese of Martirano, was injured during the collapse of his castle in the town of Pedivigliano, where he reported that the population of his diocese fell from 12,000 to 6,500 after the quake. [10] In Aiello Calabro, 408 homes were obliterated and 655 residents were killed. At least 116 inhabitants were killed in Belsito, 234 in Grimaldi, 495 in Carpanzano, 229 in Conflenti, 173 in Malito, 532 in Motta Sta Lucia, 1,200 in Nicastro, 102 in Piane Crati, 216 in Sambiase, 451 in Scigliano Diano and 126 in Feroleto. [11] The town of Martirano was destroyed and 517 inhabitants were killed. [12]

Following the earthquake, the affected areas saw a decrease in population from migration. Many inhabitants of Motta Santa Lucia moved to Decollatura, [13] and residents of Pedivigliano and Pittarella moved to Sila. [14] Survivors from Scigliano and Carpanzano relocated to the Ionian coast and formed the communes of Mandatoriccio and Savelli. [15]

The two earthquakes on March 28 occurred in the southern tip of Calabria on Palm Sunday. One of the two shocks' epicenters was near Nicastro, where 3,000 people were killed. At least 600 of the total deaths in the city resulted from the collapse of a church. Many more residents were killed in Lamezia Terme, Falerna, Feroleto Antico and Sant'Eufemia Lamezia. The quake caused a destructive tsunami in the Gulf of Saint Euphemia. [16] Damage at Sant'Eufemia Lamezia was so severe that the town was abandoned.

A second shock occurred in the Serre Calabresi, causing fissures to appear in the ground. Sulfur and flames were reported emanating from the newly formed fissures. The earthquake was particularly destructive in Rosarno and Mileto, while the town centers of Borrello, Briatico and Castelmonardo was destroyed. [16]

The June 9 nighttime earthquake registered a magnitude of 6.7 and a maximum Mercalli intensity of X. It affected the region of Sila, where six villages were destroyed. [9] Extreme damage was reported in Catanzaro and Crotone, as well as in 13 other villages. It was preceded by two strong foreshocks in the early morning and afternoon, alerting many residents to stay outdoors. Despite the severity of damage, only 52 people were killed. [17]

Aftermath

Shortly after the March earthquakes, Ettore Capecelatro, an official from the Kingdom of Naples was ordered to survey the damaged area. He returned to Naples in May. His survey became the basis for the government's decision on distributing aid and assistance. The Neapolitan court wanted to reduce revenue loss by rebuilding production and creating new business opportunities. Villages and towns where property were destroyed or had people killed were completely exempted from paying tax for five years. There were a total of 36 villages given the five-year tax relief. Forty-five villages which were categorised as "damaged but not destroyed" were given one year of tax relief. Several villages made appeals for their tax exemption re-evaluated after the June earthquake. [8]

See also

Notes

    Citations
    1. 1 2 "Significant Earthquake Information". ngdc.noaa.gov. NOAA National Centers for Environmental Information. Retrieved 13 February 2022.
    2. 1 2 Jacques et al. 2001.
    3. Rovida, Andrea; Locati, Mario; Camassi, Romano; Lolli, Barbara; Gasperini, Paolo; Antonucci, Andrea (2022). "CPTI15 v3.0 Parametric Catalog of Italian Earthquakes". National Institute of Geophysics and Volcanology. doi:10.13127/CPTI/CPTI15.3 . Retrieved 13 February 2022.
    4. 1 2 3 Bosi & Galli 2003.
    5. Domenico Martire, Calabria Sacra e Profana, Cosenza : Tipografia Migliaccio, 1877.
    6. "1638 03 27, 15:05 Calabria (Italy)". CFTI5Med. National Institute of Geophysics and Volcanology. Retrieved 17 May 2024.
    7. "1638 06 08, 09:45 Crotonese (Italy)". CFTI5Med. National Institute of Geophysics and Volcanology. Retrieved 17 May 2024.
    8. 1 2 Boschi, E.; Guidoboni, E.; Ferrari, G.; Mariotti, D.; Valensise, G.; Gasperini, P. (2000), "Catalogue of Strong Italian Earthquakes from 461 B.C. to 1997 (Appendix to volume 43 N° 4, 2000)", Annals of Geophysics, 43 (4), doi: 10.4401/ag-3668
    9. 1 2 d'Orsi n.d.
    10. Villella 1986.
    11. "Tsunami Event Information". ngdc.noaa.gov. NOAA National Centers for Environmental Information.
    12. Annibale Riccò; E. Camerana; Mario Baratta; Giovanni Di Stevano (1907). Il terremoto del 16 novembre 1894 in Calabria e Sicilia: Relazione scientifica della Commissione incaricata degli studi dal R. governo (in Italian). Roma: Tipografia nazionale di G. Bertero e c. p.  18. Vero Racconto del seguito terremoto nella Calabria inferiore, sotto li 27. di Marzo 1638 ... con il neme (sic) delle citta, castelli e terre distrutte dal detto terremoto. – Venetia, Giuliani 1638 (in Italian). Venezia: Giuliani. 1638.
    13. Bonacci 1982.
    14. Marasco 1969.
    15. Trumper, Maddalon & Chiodo 1995.
    16. 1 2 "I terremoti nella STORIA: marzo 1638, uno "spaventevole terremoto" devasta la Calabria centro-settentrionale". INGVterremoti (in Italian). 2015-03-31. Retrieved 2022-02-13.
    17. "Significant Earthquake Information". ngdc.noaa.gov. NOAA National Centers for Environmental Information. Retrieved 13 February 2022.

    Sources

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