InSAR based deformation mapping of earthquake using Sentinel 1A imagery

Suresh, Doddaalahalli Kempegowda; Yarrakula, Kiran

doi:10.1080/10106049.2018.1544289

Cited by 30 publications

(14 citation statements)

References 11 publications

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“…In seismic countries, there is daily seismic activity, where energy is released over a short or long period. Scientific works are mainly focused on the study of earthquakes that release more energy over a long period [9,18,26,27]. However, this work focused on the study of seismic activity in the range of low to moderate intensity in a short period in the coastal zone of the Biobio region since this energy may be directly related to the risk of deformation in the study area.…”

Section: Classification Of Seismic Activitymentioning

confidence: 99%

“…In seismic countries, the daily seismic activity is recorded in which energy is released in a short period. Scientific work has a major focus on studying earthquakes that release more energy over a longer period [9,18,26,27]. In Chile [14], it was found that in the period (1886 and 2010) between the two earthquakes, Santa Maria Island sank approximately 1.4 m. They used nautical surveys conducted in 1804, after the 1835 earthquake, and in 1886, along with modern echo sounder surveys and GPS (global positioning system), measurements were taken immediately before and after the 2010 earthquake to quantify the vertical deformation over the entire seismic cycle.…”

Section: Introductionmentioning

confidence: 99%

“…This is where the interferometric synthetic aperture radar (InSAR) method can be an alternative [34] because in Chile, the information coming from the receivers is not free or easy to access. The InSAR method is relatively new and is currently not fully exploited [27,[35][36][37][38]. It has a large amount of available data, high accuracy, and low cost, making it an attractive source of information.…”

Section: Introductionmentioning

confidence: 99%

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Signals of Surface Deformation Areas in Central Chile, Related to Seismic Activity—Using the Persistent Scatterer Method and GIS

et al. 2022

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Interferometric synthetic aperture radar is an effective means of measuring changes in the altitude of the Earth’s surface. In this research, the areas of surface deformation associated with low- and medium-intensity seismic events in Central Chile were analyzed using SENTINEL 1 satellite radar interferograms and geographical information system (GIS) tools. The persistent scatterer method was used to reduce noise from conventional InSAR methods. The results revealed that the coastal zone of Central Chile has a high density of daily earthquakes with a prevalence (93.03%) of low- and medium-intensity earthquakes. Monthly deformation maps were developed for the coast of the Biobio region in Central Chile. A clear deformation pattern is defined along the coast, being greater in the Arauco, Lota and Lebu areas. It was also shown that there was a slight upward trend in the north and northeast zone (i.e., δup ~3 mm/year), while there was an obvious accentuated upward trend (i.e., δup ~24 mm/year) in the southern part. This movement increases as latitude increases. This pattern is related to the daily seismic activity, the product of the movement between plates, and the geological faults located in the area. The deformation and trend maps provide certainty in terms of where hotspots are located, e.g., the most hazardous areas in the study zone, which can be applied to urban planning and/or safety assessment.

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Section: Classification Of Seismic Activitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Signals of Surface Deformation Areas in Central Chile, Related to Seismic Activity—Using the Persistent Scatterer Method and GIS

et al. 2022

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“…The monitoring technology and research on in-situ stress in China began in the 1960s, and developed rapidly in the following decades. At present, the relative monitoring technology used for crustal rock stress mainly includes GPS monitoring technology [10][11][12], Interferometric Synthetic Aperture Radar (InSAR) technology [13][14][15], and borehole strain observation technology [16][17]. Both GPS and InSAR methods can not only measure the displacement of the monitoring point in the monitoring time interval, but also derive the corresponding strain using the equation, but such methods are easily affected by the natural environment and human factors in the actual measurement, with low measurement accuracy.…”

Section: Introductionmentioning

confidence: 99%

Extrinsic Optical Fiber Pressure Sensor Based on F-P Cavity

Cai¹,

Wang²,

Wu³

et al. 2020

I2M

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Aiming at the problems of the in-situ stress monitoring sensor such as susceptibility to lightning strikes and low accuracy, this paper attempts to design one extrinsic pressure sensor based on the optical fiber sensing technology and F-P interferometer. To this end, it first introduces the structural design of the sensor, which is mainly composed of sensitive diaphragm, single-mode fiber and ceramic ring. The use of silver-plated diaphragms in the air cavity can increase the light reflectivity, thereby improving the monitoring accuracy; the insulating anti-electromagnetic interference material can make the sensor less susceptible to lightning strikes and reduce the risk of damage to the sensor due to lightning strikes. Then, the ANSYS simulation software was used to statically analyze the silverplated diaphragm of the sensor, and obtain the ideal radius and thickness values of the silver-plated diaphragm. Furthermore, to verify the accuracy and lightning protection performance of the extrinsic fiber pressure sensor based on F-P cavity in actual stress measurement, an in-situ stress monitoring experiment platform and a simulated lightning strike experiment platform were built. The pressure and temperature calibration experiments and sensor stress loading simulation showed that the sensor has a cavity length change sensitivity of 1677nm/MPa within 0-10MPa and a stress measurement resolution of 60Pa; compared with the common fiber grating method for in-situ stress measurement, the monitoring accuracy of the designed sensor has improved about 3 times; the lightning strike experiment found by using a lightning surge generator that the designed sensor has a stable operating and anti-lightning performance under the test voltage of 0.5kV. The research findings shed light on the further study of F-P cavity-based extrinsic fiber pressure sensor.

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“…Multi-temporal series of Sentinel-1A measured the spatial autocorrelation change induced by landslide (Mondini, 2017). Interferometric synthetic aperture radar (InSAR) result of Seninel-1A provided the deformation information of earthquakes (Suresh & Yarrakula, 2018). Therefore, this study proposed a method to detect the affected areas for Kumamoto earthquake in 2016 using Sentinel-1A.…”

Section: Introductionmentioning

confidence: 99%

Sentinel-1a Analysis for Damage Assessment: A Case Study of Kumamoto Earthquake in 2016

Tamkuan

Nagai

2019

mijst

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The powerful earthquakes occurred in Kumamoto at the highest magnitude 7.3 hitting this prefecture on April 16, 2016 at 01.25 A.M. local time. This study proposed a method to utilize Sentinel-1A images to detect earthquake damaged areas. There were two images being used.One was before-earthquake images (on March 3, 2016 and March, 27 2016) and another was an after-earthquake image (on April 20, 2016). The method operated on interferometric coherence of sentinel-1A image. In order to estimate the damaged areas, the coherence change between the before-earthquake and during-earthquake pairs were processed. The damage map was produced by concerning into different classes comprised of the urban damaged areas, none and less damaged of the urban areas, and non-urban areas. This approach was compared with the ground-truth data, which provides high overall accuracy at 88% (kappa coefficient is 0.82). 24 Consequently, Sentinel-1A could contribute the insightful geospatial information of the earthquake situation and support the disaster management. KeywordsDamage Assessment, Sentinel-1A, Interferometric Coherence, Kumamoto Earthquake * 1 1 * 2 2 * Sentinel-1A could be appropriately applied in the earthquake damage detection. Also, the interferometric technique was efficient enough for detecting the earthquake displacement, and the damage assessment. The interferogram shows the phase change induced by earthquake from satellite looking dimension while the coherence analysis result presents the possibility of the large damaged areas without the interference of cloud coverage, which still performs the high accuracy. Moreover, the Sentinel-1A could provide the accelerated observation within 5 days after the disaster occurred. However, the further discussions are still concerned for the future study. The result was included some effects by the processing method and atmospheric conditions because Sentinel-1A provides C-band information. The wavelength is short about 5-6 centimeters, could have more effects than the longer wavelength. The spatial resolution was roughly generated with the default resolution at 100 meters operated by the software. It was rougher than using the higher resolution such as ALOS-2, which was investigated on the earthquake damage assessment (Tamkuan & Nagai, 2017). However, the spatial resolution depends on the SAR observation modes. For damage assessment, our study considered only the damaged, and none to less damaged areas. The multi-level of damages will be considered in further study. The spatial resolution is important for the damage classification. The density of urban and damaged areas could lead to the quality of the damage map. Some damaged buildings with 100x100 pixel of non-damaged areas may unfortunately be missing information.This point should be focused for next study to improve the accuracy for the earthquake detection. ConclusionThis study proposed the method to detect the earthquake damaged areas using multitemporal Sentinel-1A images. The damaged areas could be rapidly detected i...

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InSAR based deformation mapping of earthquake using Sentinel 1A imagery

Cited by 30 publications

References 11 publications

Signals of Surface Deformation Areas in Central Chile, Related to Seismic Activity—Using the Persistent Scatterer Method and GIS

Signals of Surface Deformation Areas in Central Chile, Related to Seismic Activity—Using the Persistent Scatterer Method and GIS

Extrinsic Optical Fiber Pressure Sensor Based on F-P Cavity

Sentinel-1a Analysis for Damage Assessment: A Case Study of Kumamoto Earthquake in 2016

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