Differentiating between artificial and natural sources of electromagnetic radiation at a seismogenic fault

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F22%3A00564839" target="_blank" >RIV/67985891:_____/22:00564839 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26220/22:PU146497 RIV/00216224:14310/22:00128364

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0013795222003970" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0013795222003970</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.enggeo.2022.106912" target="_blank" >10.1016/j.enggeo.2022.106912</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Differentiating between artificial and natural sources of electromagnetic radiation at a seismogenic fault

Popis výsledku v původním jazyce

Ultralow frequency (ULF) to low frequency (LF) electromagnetic radiation represents one of the most promising effects of brittle rock strain and microcracking that might be potentially helpful for short term earthquake forecasting. In this study the results of a six month monitoring campaign are presented from Obir Cave in the eastern Alps. Direct experimental observations of electromagnetic radiation have been made using a customised broadband data logger installed next to the Obir Faultthis seismogenic fault near the Periadriatic Lineament is known to be related to at least three large prehistoric earthquakes. On the basis of these measurements it has been possible to characterise a number of distinct signals: artificial constant narrowband signals at discrete frequencies, short serial broadband impulses, high energy broadband impulses, and low energy broadband im-pulses. The narrowband artificial signals were removed from the electromagnetic radiation time series analysis so that the natural signals were enhanced and could be compared more easily to meteorological parameters and rock strain indicators. Critically, the high energy broadband impulses show a strong correlation with lightning activity across much of central Europe and the eastern Mediterranean while the low energy broadband impulses appear to be associated with local rock strain in and around Obir Cave. Unfortunately, it seems certain that some of the essential strain related impulses are likely to have been overprinted by the larger lightning related impulses.

Název v anglickém jazyce

Differentiating between artificial and natural sources of electromagnetic radiation at a seismogenic fault

Popis výsledku anglicky

Ultralow frequency (ULF) to low frequency (LF) electromagnetic radiation represents one of the most promising effects of brittle rock strain and microcracking that might be potentially helpful for short term earthquake forecasting. In this study the results of a six month monitoring campaign are presented from Obir Cave in the eastern Alps. Direct experimental observations of electromagnetic radiation have been made using a customised broadband data logger installed next to the Obir Faultthis seismogenic fault near the Periadriatic Lineament is known to be related to at least three large prehistoric earthquakes. On the basis of these measurements it has been possible to characterise a number of distinct signals: artificial constant narrowband signals at discrete frequencies, short serial broadband impulses, high energy broadband impulses, and low energy broadband im-pulses. The narrowband artificial signals were removed from the electromagnetic radiation time series analysis so that the natural signals were enhanced and could be compared more easily to meteorological parameters and rock strain indicators. Critically, the high energy broadband impulses show a strong correlation with lightning activity across much of central Europe and the eastern Mediterranean while the low energy broadband impulses appear to be associated with local rock strain in and around Obir Cave. Unfortunately, it seems certain that some of the essential strain related impulses are likely to have been overprinted by the larger lightning related impulses.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/LM2015079" target="_blank" >LM2015079: Distribuovaný systém observatorních a terénních měření geofyzikálních polí</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Engineering Geology

ISSN

0013-7952

e-ISSN

1872-6917

Svazek periodika

311

Číslo periodika v rámci svazku

DEC 20

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

106912

Kód UT WoS článku

000886066300001

EID výsledku v databázi Scopus

2-s2.0-85141259533