Age determination of paleotsunami sediments around Lombok Island, Indonesia, and identification of their possible tsunamigenic earthquakes

Aswan, Aswan; Zaim, Yahdi; Rizal, Yan; Sukanta, I Nyoman; Anugrah, Suci Dewi; Hascaryo, Agus Tri; Gunawan, Indra; Yatimantoro, Tatok; Weniza,; Hidayanti,; Hawati, Purnomo; Santoso, Wahyu Dwijo; Nurochim,

doi:10.1007/s11589-017-0179-2

Cited by 3 publications

(4 citation statements)

References 8 publications

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“…Different from tsunami deposits from Chile (Paskoff, 1991), Flores (Yeh et al, 1993) and NW Australia (Young & Bryant, 1992) that consists of coarser boulder fraction, the tsunami suspect layers that we found the study area consists only of finer grained fractions. Similar tsunami layers with fine-grained sediment character are also found in Thailand (Jean-Frank & Chanchai, 2011), Pacitan-Banyuwangi (Anugrah et al, 2015), Bali-Lombok (Aswan et al, 2017) and Cilacap . Deposition of each fraction is very much determined by the condition of the beach morphology, distance and rocks that are passed by the water flow and the shape of the beach.…”

Section: Discussionsupporting

confidence: 69%

Late Miocene to Pliocene Tsunami Deposits in Tegal Buleud, South Sukabumi, West Java, Indonesia

Rizal¹,

Aswan²,

Zaim³

et al. 2019

MAS

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Java is a volcanic island arc formed by the northwards subduction of the Eurasian and Australian Plates. Due to this active subduction, Java has been frequently shocked by earthquakes, which might induce tsunami events. However, there are hardly any ancient geological records of tsunami events in the area. This study aims to determine the presence and to identify sedimentary characters of tsunami deposit in Tegal Buleud, South Sukabumi, West Java. In the study area, there were 4 tsunami layers which were found as thin intercalation within the claystone layer of the Bentang Formation. Those paleotsunami deposits characterized by the occurrence of irregular/disturbed structure such as siltstone rip up, clay clasts, and flame structure occur in normal graded bedding sandstone layer. The grain-size distributions show bimodal and multimodal patterns, with mixing of marine microfossils from inner and middle neritic. The planktonic foraminiferal assemblage indicates that the age of the sediment comparable to N19 (equivalent to Late Miocene -Early Pliocene, at about 5.33 -3.6 Ma), suggested that these paleotsunami layers were deposited due to the Mio-Pliocene tectonic activity. All the paleotsunami deposits found in Study area are the first and oldest tsunami deposit recorded in Java even in Indonesia. With the discovery of the previously unexplored Late Miocene to Pliocene tsunami deposits found in the study area, the result of this study can be used as a reference for the identification of the Tertiary tsunami deposits present in other parts of Indonesia.

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Section: Discussionsupporting

confidence: 69%

Late Miocene to Pliocene Tsunami Deposits in Tegal Buleud, South Sukabumi, West Java, Indonesia

Rizal¹,

Aswan²,

Zaim³

et al. 2019

MAS

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“…The typical source of tsunami is the type of tsunami that is produced by tectonic earthquakes. In some literatures, tsunamis this type is mentioned as the tsunamigenic earthquakes [32][33] [34]. Looking at Figure 17a, it is evident that this type of tsunami has been leading by 126 literatures, or 67.7% of all tsunami-generation literatures in this study.…”

Section: Tsunami-generation Forcementioning

confidence: 66%

“…Studying tsunami based on their time occurrence is important for scholars to understand which methodology to use to analyse the specific tsunami. The data for recent tsunami can (b) (a) easily be found from several data sharing platform (e.g., NGDC/WDS Global Historical Tsunami Database [42]), while for ancient tsunamis where the documentation of any sort is unable to be found, many methods such as radiocarbon dating are being used [34][43] [44].…”

Section: Time Occurrencementioning

confidence: 99%

“…One reason might come from the fact that more recent tsunami events have advantages in the use of manual or instrumental observation [46], thus are easier to study due to the availability of sequential dataset. Meanwhile, the data needed to study paleotsunamis are more difficult to obtain due to the required field observation [34]. In addition, the recent major tsunami events that have occurred in Indonesia over the past two decades might have encouraged researchers to study historical tsunamis.…”

Section: Time Occurrencementioning

confidence: 99%

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Indonesian “tsunami-generation” in a nutshell: systematic literature review

Amahoru,

Ridho,

Lukafiardi

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Publications related to tsunami-generation phase hold 42.8% of all the publications over all tsunami hazard literatures in Indonesia. Corroborating the fact, tsunami-generation studies are also vital in determining the type of propagation and inundation that may appear in the surrounding coastal regions, which in practice, can also help determining disaster management specifics and risk reduction activities. A literature review regarding tsunami-generation has been done for those purpose by using our CARI! Knowledge Engine, which includes collections of both International and Indonesian journals within the scope of Indonesian locus context. This study unpacks publication trend, the most influential articles, top contributing journals, top main authors, top institutions, and dominant countries as well as the science mapping of tsunami-generation subjects. To gain deeper understanding, we also develop tsunami-generation research framework within the basis of tsunami generation force, time occurrence, monitoring, and measurement approach, as well as hazard analysis approach. From the review, an interesting peak of tsunami-generation publications has been shown in 2020 (39 publications), following the occurrence of several Indonesian major tsunamis in the previous decade and the globally impacting Aceh Tsunami (or the Indian Ocean Earthquake and Tsunami) in 2004. Among all the publications of tsunami-generation force, tsunamigenic earthquake has become the most studied topic (67.7% of all publications), while the most discussed atypical sources mainly come from volcanic eruption (46.67% of all atypical literatures) and submarine landslide (33.33% of all atypical literatures). In terms of tsunami-generation source, it is found that the Sunda Megathrust has been the most-discussed location, which is mentioned within 39 publications, followed by the Palu-Koro Fault with 18 publications and the Krakatau Volcano by 16 publications. Apart from the notice of significant difference between research of historical tsunami and paleotsunami (120:5 publications), some gaps also can be found when discussing the meteotsunami-generation mechanism in Indonesia and the Global Navigation Satellite System’s Total Electron Content (GNSS-TEC) method, which, although proven beneficial for the development of tsunami early warning system, accuracy is still the main issue in capturing tsunami signals and positioning actual source location of tsunami. These were some highlighted limitations that arise in our process to understand tsunami-generation mechanisms and the exploitations of the knowledge. Therefore, future studies specifically within these areas are further encouraged.

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