Incorporating space, time, and magnitude measures in a network characterization of earthquake events

Janer, C. D.; Biton, D. C.; Batac, R. C.

doi:10.1007/s11600-017-0100-3

Artykuł - szczegóły

Tytuł artykułu

Incorporating space, time, and magnitude measures in a network characterization of earthquake events

Autorzy

Janer C. D. , Biton D. C. , Batac R. C.

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-017-0100-3

Warianty tytułu

Języki publikacji

Abstrakty

We investigate the structural properties of a spatio-temporal network of earthquake events that incorporates magnitude information between the connected events. The network creates temporally directed links from an origin event towards a later event if it breaks the record closest distance from the origin among all the events in the catalog so far. Additionally, the links are conditionally classified based on the magnitude difference between connected events: “up” (“down”) connections point from a weaker (stronger) to a stronger (weaker) event. Using earthquake records from the Philippines from 1973 to 2012 and southern California from 1982 to 2012, we observe that the out-degree distributions show slight deviations from the corresponding Poisson distribution of the same mean. The space and time separations of connected earthquakes both show power-law regimes, suggesting spatio-temporal (self)organization. More importantly, the conditional distributions of “up” and “down” connections in space, time, and network structure point to a higher likelihood of a stronger event triggering a nearby weaker event for the first few connections, as in the case of aftershocks. The results are captured by a sandpile-based model where a small but finite probability of preferentially targeting the most susceptible grid site is introduced. Our analysis, coupled with the discrete model analog, provides a quantitative picture of the spatio-temporal and magnitude organization of seismicity beyond just the successive events. The technique may be extended to further characterize similar long-period earthquake records to yield a more complete picture of the underlying processes involved in seismicity.

Słowa kluczowe

earthquakes spatiotemporal analysis spatio-temporal network

trzęsienia ziemi analiza czasowo-przestrzenna sieć czasoprzestrzenna

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2017

Tom

Vol. 65, no. 6

Strony

1153--1166

Opis fizyczny

Bibliogr. 41 poz.

Twórcy

autor

Janer C. D.

National Institute of Physics, University of the Philippines, Diliman, Quezon City, Philippines

autor

Biton D. C.

National Institute of Physics, University of the Philippines, Diliman, Quezon City, Philippines

autor

Batac R. C.

rcbatac@up.edu.ph

National Institute of Physics, University of the Philippines, Diliman, Quezon City, Philippines

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018)

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-de00b297-4a42-49f5-b4ba-2b6b059d9190