1699 Java earthquake

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1699 Java earthquake
1699 Java earthquake is located in Java
1699 Java earthquake
Local dateJanuary 5, 1699 (1699-01-05)
Magnitude7.5–8.0 Mw
Epicenter6°04′41″S 105°54′47″E / 6.078°S 105.913°E / -6.078; 105.913Coordinates: 6°04′41″S 105°54′47″E / 6.078°S 105.913°E / -6.078; 105.913
Max. intensityIX (Violent)
Casualties28 dead

On the morning of January 5, 1699, a violent earthquake rocked the then Dutch East Indies city of Batavia on the island of Java. In the contemporary period, the Indonesian capital city Jakarta. Dutch accounts of the event described the earthquake as being "so heavy and strong" and beyond comparable to other known earthquakes.[1] This event was so large that it was felt through west Java, and into southern Sumatra.

Tectonic setting[]

The Indonesian islands of Java, Sumatra and Lesser Sunda chain lie along a destructive plate boundary where the Australian Plate meets the Sunda Plate. The plates converge, with the Australian Plate being much denser as it is oceanic lithosphere, subducting beneath the less dense Sunda Plate. Subduction is responsible for the large megathrust earthquakes along the west coast of Sumatra and south coast of Java. It also play a significant role in the volcanic activity on the islands. However, intraplate earthqakes can also occurr as the Australian Plate deforms when it is subducting; faults within the downgoing slab may result in intermediate-depth events that are also considerably large.

Earthquake[]

Approximately fifteen minutes of violent shaking was felt but the damage was limited.[2] Other descriptions stated that the earthquake lasted up to 45 minutes.[1] At least 28 people in Batavia were fatally wounded and 49 stone-constructed structures collapsed as a result of the earthquake. Some 21 homes and 29 barns were also obliterated.[3] Almost every home situated in the city suffered some extent of damage. The earthquake uprooted and toppled many trees, blocking waterways and choking river systems. At Mount Salak, a volcano on the island of Java, the violent tremors triggered landslides and debris masses, blocking rivers and causing floods. The combination of earth and vegetation produced a debris flow that passed through the Ci Liwung river and into Batavia, where it entered the Java Sea.

In the port settlement of Bantam, now Banten, the earthquake destroyed a storage warehouse and caused additional damages. In Lampung, Sumatra, the earthquake threw every home off their foundations.[2]

Origin[]

The earthquake source is not well determined but is likely a large, intermediate-depth event. Other researchers suggest it was a megathrust event with a magnitude of 9.0 Mw  along the Sunda megathrust. If it were an intraslab earthquake occurring within the downgoing Australian Plate as it subducts beneath the Sunda Plate along the Sunda megathrust, the estimated moment magnitude (Mw ) would be 7.4 to 8.0, with an epicenter near Batavia.[4] Modelling of the 1699 earthquake scenarios show that an intraslab earthquake of Mw  8.0 provided results consistent with historical documentations of the earthquake. High Mercalli intensity values at IX corresponds to the pattern of damage described by Dutch officials in Java and Sumatra. As Banten Province is situated on pyroclastic deposits and Quaternary sediments, seismic waves were likely amplified, resulting in higher degrees of shaking.[5]

Simulations of a magnitude 9.0 earthquake only produced shaking assigned at VI to VII which did not match the damage descriptions. Such intensities would only cause moderately damage. Weaker levels of shaking was produced at the mountainous regions, which were insufficient to trigger a landslide.[5]

See also[]

References[]

  1. ^ Jump up to: a b Reid, A. (2012), Historical Evidence for Major Tsunamis in the Java Subduction Zone (PDF), ARI Working Paper No. 178, Asia Research Institute, p. 4, retrieved 2017-01-11
  2. ^ Jump up to: a b Wichmann, Arthur (1918). Die erdbeben des Indischen Archipels bis zum Jahre 1857 [Earthquakes of the Indian Archipelago Until the Year 1857] (in German) (20 ed.). Afdeling Natuurkunde Nederlandse Verhandelingen. p. 193.
  3. ^ Heriyanto, Devina (2018). "Third earthquake in 2018 in Lebak: Is Jakarta ready for megathrust quake?". Jakarta, Indonesia. The Jakarta Post. Retrieved 19 June 2021.
  4. ^ Jonathan Griffin, Ngoc Nguyen, Phil Cummins, Athanasius Cipta (2018). "Historical Earthquakes of the Eastern Sunda Arc: Source Mechanisms and Intensity‐Based Testing of Indonesia's National Seismic Hazard Assessment". Bulletin of the Seismological Society of America. 109 (1): 43–65. doi:10.1785/0120180085. Retrieved 19 June 2021.CS1 maint: multiple names: authors list (link)
  5. ^ Jump up to: a b Ngoc Nguyen , Jonathan Griffin , Athanasius Cipta , Phil R. Cummins (2015). "Indonesia's Historical Earthquakes: Modelled examples for improving the national hazard map". Record 2015/23. Canberra, Australia: Geoscience Australia. doi:10.11636/Record.2015.023. ISSN 2201-702X. Retrieved 19 June 2021.CS1 maint: multiple names: authors list (link)


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