Frequency-dependent moment tensors of induced microearthquakes
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F19%3A00507597" target="_blank" >RIV/67985530:_____/19:00507597 - isvavai.cz</a>
Výsledek na webu
<a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL082634" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL082634</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2019GL082634" target="_blank" >10.1029/2019GL082634</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Frequency-dependent moment tensors of induced microearthquakes
Popis výsledku v původním jazyce
Analysis of 984 induced microearthquakes from The Geysers geothermal reservoir in California reveals that the retrieved moment tensors depend on the frequency band of the inverted waveforms. The observed dependence is more significant for the percentages of the double-couple, compensated linear vector dipole, and isotropic (ISO) components than for the focal mechanisms. The average root-mean-square of the moment tensors obtained in different frequency bands is correlated with spectra of ambient noise. The percentages of double-couple and ISO components tend to decrease and increase with the upper cutoff frequency (f(u)), respectively. This suggests that shear rupture radiates energy preferentially in a lower frequency band and tensile rupture in a higher frequency band. Events displaying a strong increase of the ISO with f(u) are confined within the same depth interval as the injection points. This might be related to the strong thermoelastic effects in the vicinity of injection points that promote opening of small cracks adjacent to the main fractures.
Název v anglickém jazyce
Frequency-dependent moment tensors of induced microearthquakes
Popis výsledku anglicky
Analysis of 984 induced microearthquakes from The Geysers geothermal reservoir in California reveals that the retrieved moment tensors depend on the frequency band of the inverted waveforms. The observed dependence is more significant for the percentages of the double-couple, compensated linear vector dipole, and isotropic (ISO) components than for the focal mechanisms. The average root-mean-square of the moment tensors obtained in different frequency bands is correlated with spectra of ambient noise. The percentages of double-couple and ISO components tend to decrease and increase with the upper cutoff frequency (f(u)), respectively. This suggests that shear rupture radiates energy preferentially in a lower frequency band and tensile rupture in a higher frequency band. Events displaying a strong increase of the ISO with f(u) are confined within the same depth interval as the injection points. This might be related to the strong thermoelastic effects in the vicinity of injection points that promote opening of small cracks adjacent to the main fractures.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10507 - Volcanology
Návaznosti výsledku
Projekt
<a href="/cs/project/GA19-06422S" target="_blank" >GA19-06422S: Sdružená inverze seismických momentových tenzorů a Greenových funkcí</a><br>
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2019
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Geophysical Research Letters
ISSN
0094-8276
e-ISSN
—
Svazek periodika
46
Číslo periodika v rámci svazku
12
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
9
Strana od-do
6406-6414
Kód UT WoS článku
000477616300029
EID výsledku v databázi Scopus
2-s2.0-85068132059