Time lapse monitoring of acoustic emissions with Coda Wave interferometry

2002 ◽  
Author(s):  
Alexandre Gre⁁t ◽  
Roel Snieder ◽  
John Scales ◽  
Mike Batzle
Keyword(s):  
Acoustic Emissions ◽  
Time Lapse ◽  
Coda Wave ◽  
Coda Wave Interferometry

scholarly journals Coda-wave interferometry analysis of time-lapse VSP data for monitoring geological carbon sequestration

2010 ◽  
Vol 4 (4) ◽  
pp. 679-686 ◽  
Author(s):  
Rongmao Zhou ◽  
Lianjie Huang ◽  
James T. Rutledge ◽  
Michael Fehler ◽  
Thomas M. Daley ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Time Lapse ◽  
Coda Wave ◽  
Geological Carbon Sequestration ◽  
Vsp Data ◽  
Coda Wave Interferometry

Time-Lapse Monitoring of Fabric Changes in Granular Materials by Coda Wave Interferometry

2012 ◽  
Vol 35 (2) ◽  
pp. 103546 ◽  
Author(s):  
L. D. Suits ◽  
T. C. Sheahan ◽  
F. Wuttke ◽  
M. Asslan ◽  
T. Schanz
Keyword(s):  
Granular Materials ◽  
Time Lapse ◽  
Coda Wave ◽  
Coda Wave Interferometry

Reservoir time-lapse variations and coda wave interferometry

2015 ◽  
Vol 12 (2) ◽  
pp. 244-254 ◽  
Author(s):  
Jie Tang ◽  
Jing-Jing Li ◽  
Zhen-An Yao ◽  
Jie Shao ◽  
Cheng-Yu Sun
Keyword(s):  
Time Lapse ◽  
Coda Wave ◽  
Coda Wave Interferometry

Time-lapse monitoring of rock properties with coda wave interferometry

2006 ◽  
Vol 111 (B3) ◽  
pp. n/a-n/a ◽  
Author(s):  
Alexandre Grêt ◽  
Roel Snieder ◽  
John Scales
Keyword(s):  
Time Lapse ◽  
Rock Properties ◽  
Coda Wave ◽  
Coda Wave Interferometry

Multiplet Based Time Lapse Velocity Changes Prior to the 2018 Eruption of Sierra Negra Volcano, Galapagos Island Observed with Coda Wave Interferometry

2020 ◽  
Author(s):  
Mariantonietta Longobardi ◽  
James Grannel ◽  
Christopher Bean ◽  
Andrew Bell ◽  
Mario Ruiz
Keyword(s):  
Wave Velocity ◽  
Seismic Wave ◽  
Seismic Velocity ◽  
Time Lapse ◽  
Coda Wave ◽  
Seismic Wave Velocity ◽  
Galapagos Island ◽  
Velocity Changes ◽  
Coda Wave Interferometry ◽  
Sierra Negra Volcano

<p align="justify"><span>Changes in external stress state and fluid content alter the mechanical properties of an geological media. </span><span>Variations in seismic wave velocity can be used as proxies for changes in stress the onset of mechanical demage and/or possible fluid ingression. Temporal variations in seismic wave velocity have previously been monitored and observed prior to volcanic eruptions. In the absence of additional constraints related to stress or fluid changes on the volcano, these pre-eruptive changes are difficult to interpret and hence the causes of them are often not well understood. </span><span>In this study, Coda Wave Interferometry (CWI) is used to measure time-lapse changes in seismic velocity on seismic multiplets (repeating similar earthquakes). In particular, we focus our analysis on using this technique to calculate the velocity changes on the data recorded prior to the 2018 eruption of Sierra Negra volcano, Galapagos Island.</span> <span>On 26th June 2018 at 09:15 UTC, a magnitude 5.3 earthquake occurred near the south-west caldera rim and an intense seismic swarm started around 17:15 UTC. Seismic tremor dominated at about 19:45 UTC, which marked the onset of the eruption. </span><span>A very large seismicity sequence preceded the eruption. The pricise relationship between the magnitude 5.3 event and the eruption is not fully constraind. Here we search for multiplets in order to achieve high time resolution velocity change information in the hours between the large earthquake and the eruption. </span><span>Our aim is to understand whether changes in seismic velocity measured with CWI on multiplets method provide new insight into the physical processes related to the eruption.</span></p><p align="justify"><br><br></p>

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