English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Modeling the 3D Dynamic Rupture of Microearthquakes Induced by Fluid Injection

Authors

Mosconi,  Francesco
External Organizations;
Geo-INQUIRE, External Organizations;

Tinti,  Elisa
External Organizations;
Geo-INQUIRE, External Organizations;

Casarotti,  Emanuele
External Organizations;
Geo-INQUIRE, External Organizations;

Gabriel,  Alice‐Agnes
External Organizations;
Geo-INQUIRE, External Organizations;

Rinaldi,  Antonio Pio
External Organizations;
Geo-INQUIRE, External Organizations;

Dal Zilio,  Luca
External Organizations;
Geo-INQUIRE, External Organizations;

Cocco,  Massimo
External Organizations;
Geo-INQUIRE, External Organizations;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in GFZpublic
Supplementary Material (public)
There is no public supplementary material available
Citation

Mosconi, F., Tinti, E., Casarotti, E., Gabriel, A., Rinaldi, A. P., Dal Zilio, L., Cocco, M. (2025): Modeling the 3D Dynamic Rupture of Microearthquakes Induced by Fluid Injection. - Journal of Geophysical Research: Solid Earth, 130, 3, e2024JB029621.
https://doi.org/10.1029/2024JB029621


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5035229
Abstract
Understanding the dynamics of microearthquakes is a timely challenge with the potential to address current paradoxes in earthquake mechanics, and to better understand earthquake ruptures induced by fluid injection. We perform fully 3D dynamic rupture simulations caused by fluid injection on a target fault for Fault Activation and Earthquake Ruptures experiments generating Mw ≤ 1 earthquakes. We investigate the dynamics of rupture propagation with spatially variable stress drop caused by pore pressure changes and assuming different slip-weakening constitutive parameters. We show that the spontaneous arrest of propagating ruptures is possible by assuming a high fault strength parameter S, that is, a high ratio between strength excess and dynamic stress drop. In faults with high S values (low rupturing potential), even minor variations in Dc (from 0.45 to 0.6 mm) have a substantial effect on the rupture propagation and the ultimate earthquake size. Modest spatial variations of dynamic stress drop determine the rupture mode, distinguishing self-arresting from run-away ruptures. Our results suggest that several characteristics inferred for accelerating dynamic ruptures differ from those observed during rupture deceleration of a self-arresting earthquake. During deceleration, a decrease of peak slip velocity is associated with a nearly constant cohesive zone size. Moreover, the residual slip velocity value (asymptotic value for a crack-like rupture) decreases to nearly zero. This means that an initially crack-like rupture becomes a pulse-like rupture during spontaneous arrest. These findings highlight the complex dynamics of small induced earthquakes, which differ from solutions obtained from conventional crack-like models of earthquake rupture.