Analyses of seismic activities and hazards in Laos: A seismicity approach

Pailoplee, Santi; Charusiri, Punya

doi:10.3319/tao.2017.03.23.01

Cited by 5 publications

(4 citation statements)

References 23 publications

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“…These moderate to strong earthquakes have been detected along major fault traces in northern Thailand (Figure 1). Even though this region is located far away from the present-day plate boundary of Southeast Asia, the Andaman-Sumatra subduction zone (Subarya et al, 2006;McCaffrey, 2009;Roy et al, 2011), paleoseismological investigations reveal that Thailand is to some extent controlled by active indent-linked strike-slip faults due to the plate boundary (Fenton et al, 2003;Pailoplee et al, 2009;Wiwegwin et al, 2014;Pailoplee and Charusiri, 2017). The largest (Mw 6.2) instrumentally recorded earthquake in Thailand occurred on 5 May 2014, causing the greatest amount of damage in Thailand's history.…”

Section: Introductionmentioning

confidence: 99%

New Insights Into the Paleoseismic History of the Mae Hong Son Fault, Northern Thailand

et al. 2022

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The Mae Hong Son Fault (MHSF) is a north-trending active fault in northern Thailand. The largest earthquake ever recorded in Thailand occurred in February 1975 with a magnitude of 5.6 and was associated with the southern end of the MHSF. Paleoearthquake magnitudes, recurrence intervals, and slip rates for the MHSF are evaluated using the morphological characteristics of the MHSF aided with a 12.5-m-resolution digital elevation model (DEM) and using fault trenching. Morphotectonic analysis, including studies of offset streams, linear valleys, triangular facets, and fault scarps, helps illustrate dextral fault movements within the MHSF zone. Two separated N–S trending basins, the Mae Hong Son to the north and the Mae Sariang to the south, are present along the MHSF. Between these basins, fault displacements decrease toward the Khun Yuam area. Surface rupture length investigation from fault segments in both basins indicates maximum credible earthquake magnitudes between 5.8 and 6.3. Fault trenching and road-cut studies show that nine earthquakes occurred along the MHSF over the past ∼43 ka. Optically stimulated luminescence (OSL) dating help define the timing of the earthquakes to ∼43, ∼38, ∼33, ∼28, ∼23, ∼18, ∼13, ∼8, and ∼3 ka. The recurrence interval of earthquakes on the Mae Hong Son Fault is ∼5,000 years and the fault has a slip rate of ∼0.04–0.15 mm/a.

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Section: Introductionmentioning

confidence: 99%

New Insights Into the Paleoseismic History of the Mae Hong Son Fault, Northern Thailand

et al. 2022

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“…However, at a 2% chance of exceeding, the PGA values are between 0.00 and 0.70g. Pailoplee and Charusiri (2017) use a seismicity approach to look at seismic activity and risks in Laos. The goal of the study is to find out which parts of the country are most likely to be affected by earthquakes and to come up with ways to lessen the effects of earthquakes.…”

Section: Methodsmentioning

confidence: 99%

“…A seismic risk assessment for Myanmar is provided by Nanthaporn and Pailoplee (2017). The study considers a variety of factors, including seismic sources and soil conditions, to estimate the probability and intensity of earthquakes in various regions of Myanmar.…”

Section: Methodsmentioning

confidence: 99%

Seismic Hazard Map of ASEAN Countries towards Risk Assessment and Sustainability of Structures and Infrastructures

HARITH,

ADNAN

2023

EPSTEM

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This study contains the most recent seismic hazard map of Southeast Asia. This area is located to the south of the Eurasian plate. The Ring of Fire that surrounds the region makes it one of the most active in terms of earthquakes and volcanoes. Malaysia, Indonesia, Thailand, Singapore, the Philippines, Myanmar, Vietnam, Laos, Cambodia, and Brunei are among the countries being studied. The goals of this project are to provide Peak Ground Acceleration (PGA) values for all regions in ASEAN countries, and then to create seismic zoning maps for these countries so that zones with non-seismic regions can be identified and zones with no special steel reinforcement-detailing requirements can be specified. The final step is to create design response spectra. Based on each nation's most recent body of literature, the PGA hazard map is created. There are two maps that need to be created, one for 10% and one for 2% probability of exceeding. The PGA contours of all the compiled maps were then reconstructed, and the baseline colours were compared to an Indonesia seismic hazard map. The maximum PGA value for Southeast Asia is as high as 0.8g at 10% and 2.0g at 2% probability of exceedance, respectively, whereas the minimum PGA value is typically equal to 0.0g at both 10% and 2% probability of exceedance. The design response spectrum distribution of the stable with moderate earthquake region from 0 to 4 s (including West Malaysia, Sabah and Sarawak of East Malaysia) and the distribution of spectra for active earthquake regions including Indonesian cities (including Acheh, Padang and Palu) are plotted. Then, the design response spectra for the selected cities in regions of moderate seismicity and active earthquakes are integrated.

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“…Since the 1980s a number of earthquakes have been recorded in Laos all occurring in the northern and northwestern parts of the country. There were 16 recorded earthquakes with magnitudes of more than six and three major earthquakes with magnitudes of more than seven (Pailoplee & Charusiri, 2017). However, no significant disasters occurred in terms of death and damage costs were recorded, despite an absence of any legal building code (until very recently) that is designed to ensure safety of life in regards to earthquakes (Japan International Cooperation Agency, 2015).…”

Section: Geography Climate and Natural Disastersmentioning

confidence: 99%

Vulnerability and Resilience to Natural Hazards among New Zealand’s Laotians

Konemixay¹

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Linguistic and cultural minorities such as migrants and refugees are particularly more vulnerable to natural hazards than the general population. Laotian New Zealanders are one such group who are not only a cultural minority but are numerically a very small group in New Zealand. Minority groups such as Laotian New Zealanders may lack capital assets to sustain their livelihoods, hence might find it more difficult to build resilience to natural disasters. Therefore, this thesis explores these twin issues of vulnerability and resilience through a Sustainable Livelihood Approach (SLA). SLA is a commonly used as a framework that analyzes human, social, natural, physical and financial capital. Using SLA I examined how such a framework can identify vulnerabilities felt by Laotian New Zealanders amidst natural hazards and how SLA can help build resilience during times of natural disasters. By employing a qualitative research approach, semi-structured interviews were carried out with 25 Laotian New Zealanders. Due to the COVID-19 pandemic, most interviews were conducted online and digitally recorded. By applying a thematic analysis main themes were identified and analysis was conducted using these themes as well as a review of government policy documents. Study results revealed that Laotian participants feel vulnerable due to language barriers and cultural discrimination. At the same time, they feel resilient since they possess some form of human, financial, physical and social capital to sustain their livelihood. These include savings, insurance, strong family and community supports, and government support. These juxtaposing ideas led me to conclude that Laotian New Zealanders seem to be both vulnerable and resilient amidst natural disasters in New Zealand.

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Analyses of seismic activities and hazards in Laos: A seismicity approach

Cited by 5 publications

References 23 publications

New Insights Into the Paleoseismic History of the Mae Hong Son Fault, Northern Thailand

New Insights Into the Paleoseismic History of the Mae Hong Son Fault, Northern Thailand

Seismic Hazard Map of ASEAN Countries towards Risk Assessment and Sustainability of Structures and Infrastructures

Vulnerability and Resilience to Natural Hazards among New Zealand’s Laotians

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