Publications in scientific journals and participation in conferences

Innovative methods for microseismic monitoring

Seismix develops innovative methods for microseismic monitoring. Learn about our work presented at international scientific conferences and/or published in peer-reviewed journals.

JpGU 2023, May 21-26, Chiba (Japan)

Estimation of amplitude noise reduction and SNR variation as a function of depth recorded by a vertical array of seismometers

Camilla Rossi^1,2,3, Francesco Grigoli⁴, Paolo Gasperini², Stefano Gandolfi³, Timur Gukov⁵, Chiara Cocorullo^1,6, Paolo Macini³

This work is focused on the mitigation of the background seismic noise effect in detection capability of seismic monitoring network, especially when we deal with low magnitude events. A solution to partially attenuate the background seismic noise is deploying seismic station in boreholes. It this sense, a general law estimating the minimum depth to place seismometers can be very useful. Here, we focused on an area close to two industrial sites, highly influenced by noise and where seismicity occurs. By using three years of continuous seismic data recorded by a vertical array, we estimate a noise attenuation relationship and SNR variation for 18 seismic events with different magnitude and hypocentral distances.

Our results show:

the noise attenuation relationship follows a logarithmic trend;
the mean amplitude attenuation within 135 m depth is about 0.16 dB/m;
the mean SNR trend increases according to depth with a more marked change between 0 and 85 m, a slightly slower increase between 85 and 235, and no evident change below 235 m depth;
the magnitude has more influence on SNR variation than the hypocentral distance;
5. an optimal installation depth could be found between 85 and 235 m.

¹ Seismix srl, Palermo
² Department of Physics and Astronomy, Alma Mater Studiorum University of Bologna
³ Department of Civil, Chemical, Environmental and Materials Engineering, Alma Mater Studiorum University of Bologna
⁴ Department of Earth Sciences, University of Pisa
⁵ Edison Stoccaggio S.p.A.
⁶ Solgeo Srl

EGU 2023, April 23-28, Vienna

Estimation of amplitude noise reduction as a function of depth with data recorded by a vertical array (Northern Italy)

Camilla Rossi^1,2,3, Francesco Grigoli⁴, Paolo Gasperini², Stefano Gandolfi³, Timur Gukov⁵, Chiara Cocorullo^1,6, Paolo Macini³

The background noise level of potential installation sites is one of the main factors limiting the detection capability of the monitoring infrastructures. To improve the seismic network capability in detecting microseismicity characterized by a low signal to noise ratio (SNR), is thus necessary to mitigate the effect of seismic noise. Here we analyse continuous seismic noise from January 2019 to December 2021 recorded at underground gas storage site of S. Potito-Cotignola in the Po Valley (Italy).

We used a broadband (BB) seismic station at surface and a vertical array composed by 6-short period 3-components seismometers installed at depth ranging between 35 to 285 m in borehole at the same location of the BB sensor.
We found that:

an evident noise reduction with depth for frequencies from 1 to 10 Hz;
for some frequencies, the noise level is below the NHNM only at depth larger than 85 m;
most of the noise reduction occurs between 0 and 35 m;
the decrease of noise level (dB) as function of depth follows a logarithmic trend

¹ Seismix srl, Palermo
² Department of Physics and Astronomy, Alma Mater Studiorum University of Bologna
³ Department of Civil, Chemical, Environmental and Materials Engineering, Alma Mater Studiorum University of Bologna
⁴ Department of Earth Sciences, University of Pisa
⁵ Edison Stoccaggio S.p.A.
⁶ Solgeo Srl

EGU 2022, May 23-27, Vienna

Microseismicity monitoring with SeisComP and 3D local velocity model

Camilla Rossi¹, Chiara Cocorullo¹, Timur Gukov², Francesco Grigoli³

In this work we show how SeisComP can be optimized for real-time data-processing for microseismic monitoring of an Underground Gas Storage field in Northern Italy.

We analysed to 2-years of continuous seismic data recorded by a network composed of 15 (surface and borehole) stations.

Our processing routine for this seismic network is the first application in Italy where a 3D velocity model is fully integrated within the real-time microseismic monitoring operations, as suggested by the Italian Guideline for Microseismicity Monitoring on Industrial activities.

¹ Seismix srl, Palermo
² Edison Stoccaggio S.p.A.
³ Department of Earth Sciences, University of Pisa

Participation in conferences

2022 IEEE

21st Mediterranean Electrotechnical Conference (MELECON)

June 14-16, 2022, Palermo

SMAU Milano

October 11-12, 2022

Thanks to the Sicilian Region, we participated in SMAU Milan 2022 together with other top Italian startups.

It was constructive, interesting and fun! We participated in several events, including Startup Safari, international meetings and Pitch Session.

We met corporate and got to know several potential customers or partners, to whom we showed the innovative methodologies that SEISMIX offers.

FINAL CHANGES AWARD CNA

December 15, 2022, Roma

At the end of November, we passed the regional selections of the Cambiamenti 2022 Prize, making it to the national final in Rome: only twenty finalists, selected from more than 1,000 startups, were were competing for the first prize!

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Innovative methods for microseismic monitoring

Seismix develops innovative methods for microseismic monitoring. Learn about our work presented at international scientific conferences and/or published in peer-reviewed journals.

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