Claire E. Harnett
Fracture and damage localization in volcanic edifice rocks from El Hierro, Stromboli and Tenerife
Harnett, Claire E.; Benson, Philip M.; Rowley, Pete; Fazio, Marco
Philip M. Benson
We present elastic wave velocity and strength data from a suite of three volcanic rocks taken from the volcanic edifices of El Hierro and Tenerife (Canary Islands, Spain), and Stromboli (Aeolian Islands, Italy). These rocks span a range of porosity and are taken from volcanoes that suffer from edifice instability. We measure elastic wave velocities at known incident angles to the generated through-going fault as a function of imposed strain, and examine the effect of the damage zone on P-wave velocity. Such data are important as field measurements of elastic wave tomography are key tools for understanding volcanic regions, yet hidden fractures are likely to have a significant effect on elastic wave velocity. We then use elastic wave velocity evolution to calculate concomitant crack density evolution which ranges from 0 to 0.17: highest values were correlated to the damage zone in rocks with the highest initial porosity.
|Journal Article Type||Article|
|Publication Date||Jan 31, 2018|
|Publisher||Nature Publishing Group|
|Peer Reviewed||Peer Reviewed|
|APA6 Citation||Harnett, C. E., Benson, P. M., Rowley, P., & Fazio, M. (2018). Fracture and damage localization in volcanic edifice rocks from El Hierro, Stromboli and Tenerife. Scientific reports, 8(1), doi:10.1038/s41598-018-20442-w|
|Keywords||Geophysics; Natural hazards; Seismology; Volcanology|
©2018 The authors
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