scholarly journals Monitoring Local Earthquakes in Central Italy Using 4C Single Station Data

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4297
Author(s):  
Andreino Simonelli ◽  
Matteo Desiderio ◽  
Aladino Govoni ◽  
Gaetano De Luca ◽  
Angela Di Virgilio
Keyword(s):  
Rotation Rate ◽  
Ring Laser ◽  
Central Italy ◽  
Broadband Seismometer ◽  
National Monitoring ◽  
Single Station ◽  
Ring Laser Gyroscope ◽  
Vertical Ground ◽  
Laser Gyroscope ◽  
Monitoring Service

In this study, performed on a set of twenty-two earthquakes that occurred in central Italy between 2019 and 2020, we will explore the possibility to locate the hypocenter of local events by using a ring laser gyroscope observing the vertical ground rotation and a standard broadband seismometer. A picking algorithm exploiting the four components (4C) polarization properties of the wavefield is used to identify the first shear onset transversely polarized (SH). The wavefield direction is estimated by correlation between the vertical rotation rate and the transverse acceleration. The picked times for Pg and Sg onsets are compared to the ones obtained after manual revision on the GIGS station seismometer. The results are compared with the location provided by the national monitoring service of the INGV.

scholarly journals Rotational motions from the 2016, Central Italy seismic sequence, as observed by an underground ring laser gyroscope

2018 ◽  
Vol 214 (1) ◽  
pp. 705-715 ◽  
Author(s):  
A Simonelli ◽  
H Igel ◽  
J Wassermann ◽  
J Belfi ◽  
A Di Virgilio ◽  
...  
Keyword(s):  
Ring Laser ◽  
Central Italy ◽  
Seismic Sequence ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope ◽  
Rotational Motions

Observation by Means of An Underground Ring Laser Gyroscope of Love Waves Generated in the Mediterranean Sea: Source Direction and Comparison with Models

2020 ◽  
Vol 91 (3) ◽  
pp. 1730-1737
Author(s):  
Andreino Simonelli ◽  
Gaetano De Luca ◽  
Umberto Giacomelli ◽  
Giuseppe Terreni ◽  
Angela Di Virgilio
Keyword(s):  
Mediterranean Sea ◽  
Rotation Rate ◽  
Ring Laser ◽  
Noise Sources ◽  
Period Range ◽  
Storm Activity ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope ◽  
The Mediterranean ◽  
Highly Correlated

Abstract In fall 2018, we have observed, by means of an underground ring laser gyroscope, the microseismic (MS) activity induced by the Mediterranean Sea in the 2–5 s period range. In the amplitude spectra, a clear peak highly correlated with a collocated seismometer appears during a large storm activity ranging from 24 November to 1 December 2018. The peak of the spectra, both for rotation rate and acceleration, are located at 3.3 s. The peak amplitudes are of 8×10−10  rad/s−1 and 3×10−6  ms−2, respectively, for vertical rotation rate and horizontal acceleration. We perform the source direction estimation by maximizing the correlation of the vertical rotation rate with the transverse acceleration. The local estimation of the direction of the wavefield is then compared with the sea state hindcasts that provide a modeling of the possible MS noise sources.

scholarly journals Concept of MEMS Ring Laser Gyroscope with Movable Optical Parts

2009 ◽  
Vol 1 (1) ◽  
pp. 564-567 ◽  
Author(s):  
T. Hashimoto ◽  
J. Maeya ◽  
T. Fujita ◽  
K. Maenaka
Keyword(s):  
Ring Laser ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope

Resonant diffraction mechanism, nonreciprocity, and lock-in in the ring-laser gyroscope

1993 ◽  
Vol 47 (1) ◽  
pp. 543-551 ◽  
Author(s):  
Fabien Bretenaker ◽  
Bruno Lépine ◽  
Annie Le Calvez ◽  
Olivier Adam ◽  
Jean-Paul Taché ◽  
...  
Keyword(s):  
Ring Laser ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope ◽  
Lock In

The influence of noise on output of Ring Laser Gyroscope

2005 ◽  
Vol 119 (1) ◽  
pp. 75-83 ◽  
Author(s):  
Wang Kedong ◽  
Yan Lei ◽  
Gu Qitai
Keyword(s):  
Ring Laser ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope ◽  
Influence Of Noise

Performance Evaluation of Integrated Semiconductor Ring Laser Gyroscope

2017 ◽  
Vol 35 (16) ◽  
pp. 3555-3561 ◽  
Author(s):  
Arpit Khandelwal ◽  
Azeemuddin Syed ◽  
Jagannath Nayak
Keyword(s):  
Performance Evaluation ◽  
Ring Laser ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope ◽  
Semiconductor Ring Laser

Beam Precision Coupling Method and Experiment of Ring Laser Gyroscope

2020 ◽  
Vol 47 (6) ◽  
pp. 0601009
Author(s):  
龚天乐 Gong Tianle ◽  
欧阳航空 Ouyang Hangkong ◽  
马立 Ma Li ◽  
赵志杰 Zhao Zhijie ◽  
荣伟彬 Rong Weibin
Keyword(s):  
Ring Laser ◽  
Coupling Method ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope

Ellipticity measurement system with double beam paths for ring laser gyroscope

2012 ◽  
Vol 20 (9) ◽  
pp. 1913-1921
Author(s):  
杨昊东 YANG Hao-dong ◽  
梁冬明 LIANG Dong-ming ◽  
岳寰宇 YUE Huan-yu ◽  
范汉伟 FAN Han-wei ◽  
刘立武 LIU Li-wu
Keyword(s):  
Measurement System ◽  
Ring Laser ◽  
Double Beam ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope
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