FEASIBILITY OF THERMAL ANOMALIES DETECTION FOR SMALL EARTHQUAKE

2017 ◽  
Author(s):  
Pisanu Wongpornchai
Keyword(s):  
Small Earthquake ◽  
Thermal Anomalies

scholarly journals Complex hazard cascade culminating in the Anak Krakatau sector collapse

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Thomas R. Walter ◽  
Mahmud Haghshenas Haghighi ◽  
Felix M. Schneider ◽  
Diego Coppola ◽  
Mahdi Motagh ◽  
...  
Keyword(s):  
Early Detection ◽  
Surface Area ◽  
Seismic Signals ◽  
Sector Collapse ◽  
Small Earthquake ◽  
Thermal Anomalies ◽  
Volcanic Islands ◽  
Krakatau Volcano ◽  
State Of Activity

Abstract Flank instability and sector collapses, which pose major threats, are common on volcanic islands. On 22 Dec 2018, a sector collapse event occurred at Anak Krakatau volcano in the Sunda Strait, triggering a deadly tsunami. Here we use multiparametric ground-based and space-borne data to show that prior to its collapse, the volcano exhibited an elevated state of activity, including precursory thermal anomalies, an increase in the island’s surface area, and a gradual seaward motion of its southwestern flank on a dipping décollement. Two minutes after a small earthquake, seismic signals characterize the collapse of the volcano’s flank at 13:55 UTC. This sector collapse decapitated the cone-shaped edifice and triggered a tsunami that caused 430 fatalities. We discuss the nature of the precursor processes underpinning the collapse that culminated in a complex hazard cascade with important implications for the early detection of potential flank instability at other volcanoes.

scholarly journals Thermal Anomalies Detection Using Comparative Method for Small Earthquake

2018 ◽  
Vol 186 ◽  
pp. 01008
Author(s):  
Pisanu Wongpornchai ◽  
Chanida Suwanprasit
Keyword(s):  
Land Surface ◽  
Plate Tectonics ◽  
Comparative Method ◽  
Thermal Anomaly ◽  
Earthquake Precursor ◽  
Small Earthquake ◽  
Thermal Anomalies ◽  
Before And After ◽  
Thermal Region ◽  
The Relationship

Thermal anomaly is one of the earthquake precursor in the earthquake preparatory phase. Remote sensing in thermal region has been employed based on the concept of stress accumulation in the active plate tectonics region, which may be transformed as temperature variation prior to earthquake. MODIS Land Surface Temperature has been commonly used to locate the thermal anomalies before the earthquake. Recently researches have been focusing on moderate or large magnitude earthquake events. In Thailand, small earthquake can severely damage the unprepared area. This study, the daily day- and nighttime data of MODIS MOD11A1 product for 30 days before and 15 days after the earthquake on April 22, 2007, in Wiang Pa Pao District, Chiang Rai Province, Thailand, were processed and analysed to locate possibility of thermal anomalies. Thermal anomalies before and after the earthquakes were detected using the comparative method. The result found that the thermal anomaly temperature could be high up to 4.1 - 10.9 C which occurred in 21 - 22 days prior to the earthquake. Therefore, it may conclude that small earthquake can also release energy as the detectable thermal anomaly. However, more study about the relationship between thermal precursor and earthquake is needed to continue.

COOKING WITH SALT: THERMAL ANOMALIES ASSOCIATED WITH SALT DIAPIRS, AND THEIR EFFECTS ON THE MATURATION OF SURROUNDING HYDROCARBONS

2018 ◽  
Author(s):  
Brenna Ayn Halverson ◽  
◽  
Stuart M. Kenderes ◽  
Jesse Merriman ◽  
Alan Whittington
Keyword(s):  
Thermal Anomalies

scholarly journals Influence of Straw Burning on Urban Air Pollutant Concentrations in Northeast China

2019 ◽  
Vol 16 (8) ◽  
pp. 1379 ◽  
Author(s):  
Zhenzhen Wang ◽  
Jianjun Zhao ◽  
Jiawen Xu ◽  
Mingrui Jia ◽  
Han Li ◽  
...  
Keyword(s):  
Northeast China ◽  
Arable Land ◽  
Pollution Index ◽  
Air Pollutant ◽  
Thermal Anomalies ◽  
Pollutant Concentrations ◽  
Moderate Resolution ◽  
Resolution Imaging ◽  
Straw Burning ◽  
Moderate Resolution Imaging Spectroradiometer

Northeast China is China’s primary grain production base. A large amount of crop straw is incinerated every spring and autumn, which greatly impacts air quality. To study the degree of influence of straw burning on urban pollutant concentrations, this study used The Moderate-Resolution Imaging Spectroradiometer/Terra Thermal Anomalies & Fire Daily L3 Global 1 km V006 (MOD14A1) and The Moderate-Resolution Imaging Spectroradiometer/Aqua Thermal Anomalies and Fire Daily L3 Global 1 km V006 (MYD14A1) data from 2015 to 2017 to extract fire spot data on arable land burning and to study the spatial distribution characteristics of straw burning on urban pollutant concentrations, temporal variation characteristics and impact thresholds. The results show that straw burning in Northeast China is concentrated in spring and autumn; the seasonal spatial distributions of PM2.5, PM10 andAir Quality Index (AQI) in 41 cities or regions in Northeast China correspond to the seasonal variation of fire spots; and pollutants appear in the peak periods of fire spots. In areas where the concentration coefficient of rice or corn is greater than 1, the number of fire spots has a strong correlation with the urban pollution index. The correlation coefficient R between the number of burned fire spots and the pollutant concentration has a certain relationship with the urban distribution. Cities are aggregated in geospatial space with different R values.

Spatial analysis of thermal anomalies from airborne multi-spectral data

2003 ◽  
Vol 24 (19) ◽  
pp. 3727-3742 ◽  
Author(s):  
X. Zhang ◽  
J. L. Van Genderen ◽  
H. Guan ◽  
S. Kroonenberg
Keyword(s):  
Spatial Analysis ◽  
Spectral Data ◽  
Thermal Anomalies

Subduction of decadal North Pacific thermal anomalies in an ocean GCM

2001 ◽  
Vol 28 (12) ◽  
pp. 2449-2452 ◽  
Author(s):  
Rong-Hua Zhang ◽  
Takashi Kagimoto ◽  
Stephen E. Zebiak
Keyword(s):  
North Pacific ◽  
Thermal Anomalies

Characterization of volcanic thermal anomalies by means of sub-pixel temperature distribution analysis

2005 ◽  
Vol 68 (7-8) ◽  
pp. 641-651 ◽  
Author(s):  
Valerio Lombardo ◽  
Maria Fabrizia Buongiorno ◽  
Stefania Amici
Keyword(s):  
Temperature Distribution ◽  
Distribution Analysis ◽  
Thermal Anomalies
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