Spurious velocity changes caused by temporal variations in ambient noise frequency content
نویسندگان
چکیده
منابع مشابه
Spurious velocity changes caused by temporal variations in ambient noise frequency content
S U M M A R Y Ambient seismic noise cross-correlations are now being used to detect temporal variations of seismic velocity, which are typically on the order of 0.1 per cent. At this small level, temporal variations in the properties of noise sources can cause apparent velocity changes. For example, the spatial distribution and frequency content of ambient noise have seasonal variations due to ...
متن کاملG JI S ei sm ol og y Spurious velocity changes caused by temporal variations in ambient noise frequency content
S U M M A R Y Ambient seismic noise cross-correlations are now being used to detect temporal variations of seismic velocity, which are typically on the order of 0.1 per cent. At this small level, temporal variations in the properties of noise sources can cause apparent velocity changes. For example, the spatial distribution and frequency content of ambient noise have seasonal variations due to ...
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Continuous data recorded at 39 broadband stations near the Longmen Shan Fault operated by the China Earthquake Administration from 1 January 2008 to 30 September 2010 are used to study temporal variability in direct surface wave arrivals extracted from ambient noise. We use a cross-correlation technique to compute Empirical green functions (EGFs) for all available station pairs at the frequency...
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Detecting temporal changes of the medium associated with major earthquakes has implications for understanding earthquake genesis. Here we report temporal changes of surface wave velocity over a large area associated with 3 major Sumatra earthquakes in 2004, 2005, and 2007. We use ambient noise correlation to retrieve empirical Green's function (EGF) of surface waves between stations. Because th...
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Precise and detailed knowledge of the dynamic characteristics of structt~res has become increasingly important in recent years. As a consequence, the accuracy of experbnental data, which is often used to validate and update fmite element models, has become extremely i”lporta”t. It has been shown expetientally [II that small changes in ambient temperature can cause distinct variations in the nat...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 2013
ISSN: 1365-246X,0956-540X
DOI: 10.1093/gji/ggt170