SwePub
Sök i LIBRIS databas

  Utökad sökning

WFRF:(Benediktsdottir Bryndis)
 

Sökning: WFRF:(Benediktsdottir Bryndis) > (2020-2024) > Volcanic tremor of ...

Volcanic tremor of the 2010 Eyjafjallajökull eruption

Benediktsdottir, Asdis (författare)
Univ Iceland, Nordic Volcanol Ctr, Inst Earth Sci, Iceland GeoSurvey, Grensasvcwur 9, Reykjavik, Iceland.;Iceland Geosurvey, Reykjavik, Iceland.
Gudmundsson, Ólafur (författare)
Uppsala universitet,Geofysik
Li, Ka Lok (författare)
Uppsala universitet,Geofysik,Dublin Inst Adv Studies, Sch Cosm Phys, Geophys Sect, Dublin D04 C932, Ireland
visa fler...
Brandsdottir, Bryndis (författare)
Univ Iceland, Nordic Volcanol Ctr, Inst Earth Sci, Iceland GeoSurvey, Grensasvcwur 9, Reykjavik, Iceland.
visa färre...
Univ Iceland, Nordic Volcanol Ctr, Inst Earth Sci, Iceland GeoSurvey, Grensasvcwur 9, Reykjavik, Iceland;Iceland Geosurvey, Reykjavik, Iceland. Geofysik (creator_code:org_t)
2021-09-22
2022
Engelska.
Ingår i: Geophysical Journal International. - : Oxford University Press. - 0956-540X .- 1365-246X. ; 228:2, s. 1015-1037
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • Volcanic eruptions in Iceland generally start with an increase in tremor levels. These signals do not have clear onset, like many earthquakes. As the character of the tremor signal is variable from one volcano to another, locating the source of the tremor signal may require different techniques for different volcanoes. Continuous volcanic tremor varied considerably during the course of the Eyjafjallajökull summit eruption, 14 April to 22 May 2010, and was clearly associated with changes in eruptive style. The tremor frequencies ranged between 0.5 and 10 Hz, with increased vigour during an effusive and explosive phase, in comparison with purely explosive phases. Higher-frequency tremor bursts early in the eruption were caused by processes at the eruption site. Location of the tremor using a method based on differential phase information extracted from interstation correlograms showed the tremor to be stable near the eruption vent, through time, for signals between 0.5 and 2 Hz. Analyses of power variations of the vertical component of the tremor with distance from the eruption site are consistent with tremor waveform content being dominated by surface waves in the 0.5–2 Hz frequency range. The tremor source depth was argued to be shallow, less than about 1 km. The attenuation quality factor (Q) was found to be on the order of Q = 10–20 for paths in the area around Eyjafjallajökull and Q = 20–50 for paths outside the volcano. The pattern of radiated wave energy from the tremor source varied with time, defining ten different epochs during the eruption. Thus the tremor-source radiation did not remain isotropic, which needs to be considered when locating tremor based on amplitude, that is azimuthally variable source radiation.

Ämnesord

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Geology (hsv//eng)

Nyckelord

Seismic attenuation
Volcano seismology
Volcanic hazards and risks

Publikations- och innehållstyp

ref (ämneskategori)
art (ämneskategori)

Hitta via bibliotek

Till lärosätets databas

Sök utanför SwePub

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy