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Self-constrained inversion of microgravity data along a segment of the Irpinia fault
- Source :
- Journal of Applied Geophysics. 124:148-154
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- A microgravity survey was completed to precisely locate and better characterize the near-surface geometry of a recent fault with small throw in a mountainous area in the Southern Apennines (Italy). The site is on a segment of the Irpinia fault, which is the source of the M6.9 1980 earthquake. This fault cuts a few meter of Mesozoic carbonate bedrock and its younger, mostly Holocene continental deposits cover. The amplitude of the complete Bouguer anomaly along two profiles across the fault is about 50 μGal. The data were analyzed and interpreted according to a self-constrained strategy, where some rapid estimation of source parameters was later used as constraint for the inversion. The fault has been clearly identified and localized in its horizontal position and depth. Interesting features in the overburden have been identified and their interpretation has allowed us to estimate the fault slip-rate, which is consistent with independent geological estimates.
- Subjects :
- geography
geography.geographical_feature_category
010504 meteorology & atmospheric sciences
Estimation theory
Bedrock
Gravity
Inversion (geology)
Interpretation
Inversion
010502 geochemistry & geophysics
Geodesy
01 natural sciences
Overburden
Geophysics
Amplitude
Potential field
Horizontal position representation
Parameter estimation
Holocene
Bouguer anomaly
Seismology
Geology
Active fault throw
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 09269851
- Volume :
- 124
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Geophysics
- Accession number :
- edsair.doi.dedup.....eeb4f37c5d77f3c0a4b43437d3ab51ca