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ALLGEMEIN => Pressespiegel => Thema gestartet von: Carin am August 30, 2015, 15:11:56

Titel: Erdbeben der Stärke 4.5 offenbar direkt durch Fracking-Vorgang ausgelöst
Beitrag von: Carin am August 30, 2015, 15:11:56

> Neues aus Kanada:
>
> Erdbeben der Stärke 4.5 während Fracking-Vorgang
>
> Behörde hält Frack-Operation für »wahrscheinliche« Ursache des
> 4.5er-Bebens am letzten Montag bei Fort St. John, British Columbia. In
> dem Areal hatte es bereits mehrere, eindeutig direkt durch
> Frack-Vorgänge induzierte Erdstöße gegeben.
>
> Quellen:
> Alaska Highway News, 18.8.15
> http://www.alaskahighwaynews.ca/regional-news/monday-s-quake-likely-caused-by-fracking-ogc-confirms-1.2034628 (http://www.alaskahighwaynews.ca/regional-news/monday-s-quake-likely-caused-by-fracking-ogc-confirms-1.2034628)

Das rezente Beben, das offenbar durch einen Fracking-Vorgang selbst in British Columbia ausgelöst wurde, war mit das stärkste, jemals durch Fracking ausgelöste, schreibt The Globe and Mail (http://www.theglobeandmail.com/news/british-columbia/fracking-induced-quakes-in-bc-are-among-largest-on-record/article26122142/).

Die Frage, die das aufwirft: Wie stark können solche menschgemachten Beben werden?

“The key question is that if we have earthquakes of that size [from fracking], is it conceivable that we could have one that is actually a damaging earthquake?” said John Clague, an earthquake expert at Simon Fraser University, near Vancouver. “I’m afraid we don’t have the answer to that.”

Mr. Clague added that while it’s “extremely unlikely” a fracking-related quake would ever reach higher than magnitude 6, he said seismic activity of 5 or 6 is still worrisome because it can be damaging.

“There’s a huge difference between a 4.4. and a 5,” he said. “To be perfectly honest, we don’t know what the upper limit of a fracking-induced earthquake can be.”

Noch ein bisschen mehr Hintergrund:
>
> http://www.cbc.ca/news/canada/british-columbia/fracking-halted-temporarily-after-4-6-magnitude-earthquake-near-fort-st-john-1.3198704
>
> Fracking halted temporarily after 4.6-magnitude earthquake near Fort St.
> John
> Progress Energy's activities being investigated for links to quake
>
> By Betsy Trumpener, CBC NewsPosted: Aug 21, 2015 12:40 PM PT Last
> Updated: Aug 21, 2015 7:02 PM PT
>
> http://www.cbc.ca/news/canada/british-columbia/fracking-halted-temporarily-after-4-6-magnitude-earthquake-near-fort-st-john-1.3198704
>
> __________________________________________________________
>
> 2012
> https://www.bcogc.ca/node/8046/download
>
> 2014
> https://www.bcogc.ca/node/12291/download
>
> __________________________________________________________
>
> Human-Induced Earthquakes from Deep-Well Injection: A Brief Overview
> May 12, 2015
> https://www.fas.org/sgp/crs/misc/R43836.pdf