Earthquake-enhanced permeability – evidence from carbon dioxide release following the ML3.5 earthquake in West Bohemia

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F17%3A00479549" target="_blank" >RIV/67985530:_____/17:00479549 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/17:10363701 RIV/00216208:11320/17:10363701

Result on the web

<a href="http://dx.doi.org/10.1016/j.epsl.2016.12.001" target="_blank" >http://dx.doi.org/10.1016/j.epsl.2016.12.001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.epsl.2016.12.001" target="_blank" >10.1016/j.epsl.2016.12.001</a>

Result language

angličtina

Original language name

Earthquake-enhanced permeability – evidence from carbon dioxide release following the ML3.5 earthquake in West Bohemia

Original language description

The West Bohemia/Vogtland region is characterized by earthquake swarm activity and degassing of CO2 of mantle origin. A fast increase of CO2 flow rate was observed 4 days after a M-L 3.5 earthquake in May 2014 in the Hartousov mofette, 9 km from the epicentres. During the subsequent 150 days the flow reached sixfold of the original level, and has been slowly decaying until present. Similar behavior was observed during and after the swarm in 2008 pointing to a fault-valve mechanism in long-term. Here, we present the results of simulation of gas flow in a two dimensional model of Earth's crust composed of a sealing layer at the hypocentre depth which is penetrated by the earthquake fault and releases fluid from a relatively low-permeability lower crust. This simple model is capable of explaining the observations, including the short travel time of the flow pulse from 8 km depth to the surface, long-term flow increase and its subsequent slow decay. Our model is consistent with other analyse of the 2014 aftershocks which attributes their anomalous character to exponentially decreasing external fluid force. Our observations and model hence track the fluid pressure pulse from depth where it was responsible for aftershocks triggering to the surface where a significant long-term increase of CO2 flow started 4 days later.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10507 - Volcanology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Earth and Planetary Science Letters

ISSN

0012-821X

e-ISSN

—

Volume of the periodical

460

Issue of the periodical within the volume

February

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

60-67

UT code for WoS article

000393008500007

EID of the result in the Scopus database

2-s2.0-85006921244