Speaker
Description
Compared with the surface, deep underground laboratories are characterized with ‘super-quiet’ and ‘ultra-clean’ environment, which could be a perfect experimental platform for long-term and high-precision geophysical observation and relevant research (Gaffet et al.,2003; Rosat et al.,2016; Simonelli et al.,2016; Bruno & Fulgione, 2019; Wang et al.,2022). Since 1950s, many underground laboratories have been established using cavities in mountain or mining tunnels (Lesko, 2008, 2015; Acernese et al., 2010). We rehabilitate a discarded coal mine, where the mining tunnels reach deep to -848m below sea level, and are buiding Huainan Deep Underground Laboratory (HDUL); and simultaneously execute nearly two-year of joint geophysical observations (Wang et al.,2023), including radioactivity survey, gravity, geomagnetic, magnetotelluric and seismic observations.
It is verified that the levels of ambient noise, vibration and electromagnetic interference at HDUL is obviously prior to the surface environment. It can be inferred that HDUL not only benefit for ultra-lower background cosmic observation and research, depurative magnetic and electric observations, quiet gravity and seismic observations, it will provide helps to clean and correct the polluted data observed at the surface and provide ideal platform to metrological research (Chen et al.,2022; Chen et al.,2023; Sun et al.,2022). As many research have supported that the underground Lab is specially suitable to perform space physics, atmospheric physics, astronomics, cosmology, solid geophysics etc, multi-disciplinary observation and studies, our low-temperature SQUID magnetic observation in HUDL presents fT magnetic background, which promise the probability to explore the origin of intrinsic magnetic field of the earth and possible correlation between the Schumann' resonance and the brain magnetic field.
References
Acernese F, De Rosa R, De Salvo R, et al. 2010. Long term seismic noise acquisition and analysis in the Homestake mine with tunable monolithic sensors. Journal of Physics: Conference Series, 228: 012036, doi: 10.1088/1742-6596/228/1/012036.
Bruno, G., & Fulgione, W. (2019). Flux measurement of fast neutrons in the Gran Sasso underground laboratory. The European Physical Journal C, 79(9), 747. https://doi.org/10.1140/epjc/s10052-019-7247-9
Chen, C., Wang, Y. (2023). Deep Underground Earthquake Observation: Translations, Rotations and Applications. 84th EAGE annual.
Chen, C., Wang, Y., Guo, G., Cao, Y., Li, S., Zhang, D., et al. (2022). Deep underground observation comparison of rotational seismometers. Chinese Journal of Geophysics (in Chinese), 65(12), 4569–4582. https://doi.org/10.6038/cjg2022Q0318
Gaffet, S., Guglielmi, Y., Virieux, J., Waysand, G., Chwala, A., Stolz, R., et al. (2003). Simultaneous seismic and magnetic measurements in the Low-Noise Underground Laboratory (LSBB) of Rustrel, France, during the 2001 January 26 Indian earthquake. Geophysical Journal International, 155(3), 981–990. https://doi.org/10.1111/j.1365-246X.2003.02095.x
Lesko K T. 2008. The deep underground science and engineering laboratory at Homestake. Journal of Physics: Conference Series, 136: 022022, doi: 10.1088/1742-6596/136/2/022022.
Lesko K T. 2015. North American deep underground laboratories: Soudan Underground Laboratory, SNOLab, and the Sanford Underground Research Facility. AIP Conference Proceedings, 1672(1): 020001, doi: 10.1063/1.4927978.
Rosat, S., Hinderer, J., Boy, J.-P., Littel, F., Boyer, D., Bernard, J.-D., et al. (2016). First analyses of the iOSG-type superconducting gravimeter at the low noise underground laboratory (LSBB URL) of Rustrel, France. E3S Web of Conferences, 12, 06003. https://doi.org/10.1051/e3sconf/20161206003
Simonelli, A, Belfi Jacopo, Beverini Nicolò, Carelli Giorgio, Di Virgilio Angela, Maccioni Enrico, et al. (2016). First deep underground observation of rotational signals from an earthquake at teleseismic distance using a large ring laser gyroscope. Annals of Geophysics, 59, 1. https://doi.org/10.4401/ag-6970
Sun, H., Chen, X., Wei, Z., Zhang, M., Zhang, G., et al. (2022). A preliminary study on the ultra-wide band ambient noise of the deep underground based on observations of the seismometer and gravimeter. Chinese Journal of Geophysics (in Chinese), 65(12): 4543-4554, https://doi.org/10.6038/cjg2022Q0559
Wang, Y., Jian, Y., He, Y., Miao, Q., Teng, J., Wang, Z., et al. (2022). Underground laboratories and deep underground geophysical observations. Chinese Journal of Geophysics (in Chinese), 65(12): 4527-4542, https://doi.org/10.6038/cjg2022Q0404
Wang, Y., Yang, Y., Sun, H., Xie, C., Zhang, Q., Cui, X., et al. (2023). Observation and research of deep underground multi-physical fields—Huainan −848 m deep experiment. Science China Earth Sciences, 66(1), 54–70. https://doi.org/10.1007/s11430-022-9998-2
