Characteristics of hydroseismograms in Jingle well, China

Anhua, He; Deng, Weiping; Singh, Ramesh P.; Lyu, Fan

doi:10.1016/j.jhydrol.2019.124529

Cited by 4 publications

(3 citation statements)

References 28 publications

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“…Another recent study 29 conducted in China has corroborated our results and strengthened the relationship between teleseismic waves and groundwater level responses. Despite only having one monitored well, these authors observed 61 responses from distant earthquakes.…”

Section: Discussionsupporting

confidence: 88%

“…Previous studies have highlighted permanent and transient signals that are characterized by step-like and/or spike-like temporal changes both upward and/or downward 26 – 28 . Only a few studies have reported groundwater level variations induced by earthquakes that are very far away from the observation point, known as ‘teleseism’ 3 , 25 , 26 , 29 , 30 . According to the USGS a teleseism is a tremor related to seismic events occurring more than 1000 km away 31 .…”

Section: Introductionmentioning

confidence: 99%

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New observations in Central Italy of groundwater responses to the worldwide seismicity

Barberio

Gori

Barbieri

et al. 2020

Sci Rep

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Chemical and physical responses of groundwater to seismicity have been documented for thousands of years. Among the waves produced by earthquakes, Rayleigh waves can spread to great distances and produce hydrogeological perturbations in response to their passage. In this work, the groundwater level, which was continuously recorded in a monitoring well in Central Italy between July 2014 and December 2019, exhibited evident responses to dynamic crustal stress. In detail, 18 sharp variations of the groundwater level due to worldwide Mw ≥ 6.5 earthquakes were observed. Apart from earthquakes that occurred in Papua New Guinea and those with a hypocentral depth > 150 km, all far away Mw ≥ 7.6 earthquakes produced impulsive oscillations of groundwater. As the earthquake magnitude decreased, only some earthquakes with 6.5 ≤ Mw < 7.6 caused groundwater level perturbations, depending on the data acquisition frequency and epicentral distance from the monitoring well. A clear correlation between earthquake distance and magnitude in hydrogeological responses was found. Our results shed light on the hydrosensitivity of the study site and on the characteristics of fractured aquifer systems. Detecting the water table variations induced by distant earthquakes is another step towards a correct identification of (preseismic) hydrogeological changes due to near-field seismicity.

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

New observations in Central Italy of groundwater responses to the worldwide seismicity

Barberio

Gori

Barbieri

et al. 2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…CC BY 4.0 License. the theoretical calculations and characterization (Gulley et al, 2013;Liu et al, 2017;Lee et al, 2017;He et al, 2020;Yan et al, 2020;Ma et al, 2023). Earth solid tides are characterized by fixed periods and amplitudes, and the tidal response of groundwater level can be conveniently utilized for quantitative calculation of well-aquifer structural parameters.…”

Section: Introductionmentioning

confidence: 99%

Analysis of phase lead "anomalies" in the tidal response of groundwater levels

He,

Liu,

Sun

et al. 2023

Preprint

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Abstract. The tidal response to the groundwater level refers to an aquifer under the influence of tidal forces, the pressure head (pore pressure) within the aquifer produces changes that drive the alternating transportation of water between well-aquifers, causing the rise and fall of the water level in the wells. Considering the driving process of force and seepage of water, the groundwater level response should only have a phase lag compared to the Earth's solid tides. However, the actual observation data show that the phase of the groundwater level tidal response exceeded that of the theoretical gravity tides, which is not in accordance with the commonly occurring mechanical process of the phenomenon. Using the theory of trans-current recharge, the seepage of aquifer water was decomposed into lateral and vertical transport, and the two kinds of "lagging" transport processes were superimposed to obtain the final groundwater level tidal response, which may appear as an anomalous phenomenon in which the phase is over the front after superposition. Taking the Lugu Lake well as an example, before the Wenchuan earthquake, the phase of groundwater level was ahead of the theoretical solid tide, indicating the existence of a transgressive aquifer, whereas the groundwater level tidal factor declined from 0.28 mm/uGal before the earthquake to 0.23 mm/uGal after the earthquake. The phase, from 15 min ahead in pre-earthquake to 15 min lagged after the earthquake, combined with the theoretical analysis it can be seen that the Wenchuan earthquake led to develop the new fissure in the Lugu Lake well, thus permanently altering its aquifer response and changing the permeability of the aquifer. However, the subsequent earthquakes did not produce new fissures; only the seismic waves caused by the stress redistribution process were observed. This co-seismic response of the groundwater level shows a step-down phenomenon, phase analysis of the groundwater level has scientific significance for the study of well-aquifer conditions and well-borehole seismic capacity.

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