Comparison of Stress Azimuth Data Derived by Geogenic Electromagnetic Radiation Technique and from the Analysis of Exhumation Joints

Das, Sarmistha; Mallik, Jyotirmoy; Das, Ayanangshu; Bandyopadhyay, Krishanu

doi:10.18520/cs/v115/i6/1039-1041

Cited by 7 publications

(7 citation statements)

References 7 publications

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“…The FEMR data is collected with a portable instrument, ANGEL-M, manufactured by JSC, VNIMI, Russia 24 – 26 , 47 . This instrument enables the acquisition of electromagnetic radiation caused by rock fracturing on the geophysical scale 24 , 25 , 47 , 50 as well as in underground conditions (like mining, tunneling, etc.) 26 .…”

Section: Methodsmentioning

confidence: 99%

“…Recent seismo-electromagnetic studies enable real-time monitoring of fractures, from laboratory to large-scale geological contexts 28 – 31 . The Fracture Electromagnetic Radiation (FEMR) method detects Earth's fractures by generating electromagnetic radiation from brittle rock bodies stressed in the near-surface crust 26 , 34 , 39 , 40 , 47 . External stimuli, like deviatoric stresses in active tectonic zones, induce microcrack formation, leading to material rupture.…”

Section: Introductionmentioning

confidence: 99%

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Insights into the Dead Sea Transform Activity through the study of fracture-induced electromagnetic radiation (FEMR) signals before the Syrian-Turkey earthquake (Mw-6.3) on 20.2.2023

Das,

Frid,

Rabinovitch

et al. 2024

Sci Rep

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Observations of fracture-induced electromagnetic radiation (FEMR) were conducted along the Dead Sea Transform (DST) from Sodom to Jericho, coinciding with a magnitude (Mw) 6.3 aftershock earthquake (EQ) in the Turkey-Syrian region on February 20, 2023. The FEMR parameters (“hits,” Benioff strain release, frequency, rise-time, energy) and associated crack dimensions were analyzed, focusing on trends leading up to the EQ. This study investigated the Benioff Strain plot and other parameters in three consecutive earthquake nucleation stages leading to the catastrophe. The first stage showed increased FEMR hits and frequency, decreased rise time (T′), and crack dimensions. In the second stage, FEMR hits and crack width decreased while other parameters continued to rise, accumulating the second-highest energy, likely due to high-stress drop. The third stage exhibited steadily increasing FEMR hits and energy and a notable increase in crack dimensions, suggesting an imminent macro failure event. The cyclic trend in FEMR hits indicates alternating periods of high activity and silence, potentially linked to stress changes during crack propagation. Taken shortly before the earthquake, these measurements offer valuable insights into how FEMR parameters vary before seismic events, bridging the gap between lab-scale studies of rock collapses under stress and large-scale failure phenomena.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Insights into the Dead Sea Transform Activity through the study of fracture-induced electromagnetic radiation (FEMR) signals before the Syrian-Turkey earthquake (Mw-6.3) on 20.2.2023

Das,

Frid,

Rabinovitch

et al. 2024

Sci Rep

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show abstract

“…In recent times, seismo-electromagnetic studies have enabled real-time monitoring of the fracture process not just pertaining to laboratory scale but also projected to large-scale geological studies [28][29][30][31] . The FEMR working principle for Earth's fracture detection is based on the generation of electromagnetic radiation emanating from the brittle rock bodies that are fractured under an incremental increase of the differential stress in the near-surface of the Earth's crust 26,34,39,40,47 . An external stimulus inducing stress on a material leads to microcrack generation and propagation, which ultimately ruptures the material with increasing stress.…”

Section: Rigorous Acoustic Emission (Ae) and Femr Experiments On Vari...mentioning

confidence: 99%

“…M with one antenna procuring data in various geological applications with different modes such as horizontal, linear, and cross-sectional modes [24][25][26]47 . The current study, however, has used an upgraded version of the instrument, enabling it to perform and visualize 3-D measurements using three antennas simultaneously 50 .…”

Section: Data Filtering and Signal Processing: Das Et Al 2020 Have De...mentioning

confidence: 99%

Fracture-induced Electromagnetic radiation (FEMR) predicting the Syrian-Turkey earthquake (Mw-6.3) on 20.2.2023: An insight on the Dead Sea transform activity

Das,

Frid,

Rabinovitch

et al. 2023

Preprint

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Observations of fracture-induced electromagnetic radiation (FEMR) were conducted along the Dead Sea Transform (DST) from Sodom to Jericho, coinciding with a magnitude (Mw) 6.3 aftershock earthquake (EQ) in the Turkey-Syrian region on February 20, 2023. The FEMR parameters ("hits," Benioff strain release, frequency, rise-time, energy) and associated crack dimensions were analyzed, focusing on trends leading up to the EQ. This study investigated the Benioff Strain plot and other parameters in three consecutive earthquake nucleation stages leading to the catastrophe. The first stage showed increased FEMR hits and frequency, decreased rise time (T'), and crack dimensions. In the second stage, FEMR hits and crack width decreased while other parameters continued to rise, accumulating the second-highest energy, likely due to high-stress drop. The third stage exhibited steadily increasing FEMR hits and energy and a notable increase in crack dimensions, suggesting an imminent macro failure event. The cyclic trend in FEMR hits indicates alternating periods of high activity and silence, potentially linked to stress changes during crack propagation. Taken shortly before the earthquake, these measurements offer valuable insights into how FEMR parameters vary before seismic events, bridging the gap between lab-scale studies of rock collapses under stress and large-scale failure phenomena.

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“…2) (Balakrishna 1963). The sandstones are exposed as inliers within the Deccan basalt and are aerially distributed in small hills in and around the city of Bhopal (Das et al 2018). The IISER Bhopal Hill is a part of Deccan traps which are located in the middle trap suite of the Malwa volcanic unit (Fig.…”

Section: Geology Of Areamentioning

confidence: 99%

Application of Fracture Induced Electromagnetic Radiation (FEMR) technique to detect landslide-prone slip planes

et al. 2020

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Landslides are one of the many catastrophic events which result in massive destruction and loss of lives across the globe. Hence, an appropriate forecasting technique is essential in order to predict such potential weak slip planes which may eventually lead to landslides. Here, we present a study where Fracture Induced Electromagnetic Radiation (FEMR) technique has been used to identify such regions of potential "activity" in a study area around IISER Bhopal Hill, India, stretched along a length of approximately 1 km. The hill is majorly composed of basaltic rocks belonging to the Deccan traps which have been heavily weathered and have resulted in the formation of unconsolidated soil cover. In numerous locations, it has been observed that natural gullies have formed as a result of the breakage of masses from weak slip planes. In this study, we have taken linear measurements along four different profiles along and across the hill using a portable measuring device ANGEL-M. Anomalously high amplitudes of FEMR values are obtained in the regions which consist of weak slip planes which can be considered to be potential zones of future landslides. The results were further verified by calculating the factor of safety for a few locations along the profiles where anomalies in the FEMR data were compared. Consequently, predicting areas prone to natural calamities such as landslides has always been a priority in terms of current research. Hence, we have made an active endeavor to propose a new technique in order to identify landslide-prone areas by detecting the adjoining weak slip planes.

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Comparison of Stress Azimuth Data Derived by Geogenic Electromagnetic Radiation Technique and from the Analysis of Exhumation Joints

Cited by 7 publications

References 7 publications

Insights into the Dead Sea Transform Activity through the study of fracture-induced electromagnetic radiation (FEMR) signals before the Syrian-Turkey earthquake (Mw-6.3) on 20.2.2023

Insights into the Dead Sea Transform Activity through the study of fracture-induced electromagnetic radiation (FEMR) signals before the Syrian-Turkey earthquake (Mw-6.3) on 20.2.2023

Fracture-induced Electromagnetic radiation (FEMR) predicting the Syrian-Turkey earthquake (Mw-6.3) on 20.2.2023: An insight on the Dead Sea transform activity

Application of Fracture Induced Electromagnetic Radiation (FEMR) technique to detect landslide-prone slip planes

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