Results 71 to 80 of about 1,209 (179)

INFLUENCE OF THE SPATIAL ARRANGEMENT OF SEISMIC DETECTORS ON THE ACCURACY OF EARTHQUAKE HYPOCENTRE DETERMINATION

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2017
Objectives. To determine the coordinates of the seismic focus of an earthquake with a minimum margin of error with the use of an optimal selection of seismic sensors. Method.
T. G. Aslanov   +3 more
doaj   +1 more source

Earthquake Hypocenter data base available

open access: yesEos, Transactions American Geophysical Union, 1971
A magnetic tape containing hypocenter data for 40,000 earthquakes from January 1961 through August 1970 is now available from NOAA's National Geophysical Data Center. These data were used by the National Ocean Survey (formerly Coast and Geodetic Survey) to produce World and Regional Seismicity Maps.
openaire   +1 more source

HypoCenter distribution of volCaniC earthquakes beneath Mount Sinabung (OCt 2023–Apr 2024) using an adaptive damping Geiger reloCation

open access: yesГеология и геофизика Юга России
Relevance. Mount Sinabung has remained one of the most active volcanoes in Indonesia during the past decade, producing recurrent seismic swarms that reflect dynamic subsurface processes.
Э. Минарто   +2 more
doaj  

ANALYSIS OF ERROR DISTRIBUTION DENSITY IN DETERMINING THE COORDINATES OF EARTHING EARTH IN THE METHODS OF SPHERES AND ELLIPSOIDS

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2019
Objectives The purpose of the study is to obtain an expression for determining the coordinates of the earthquake focus using the ellipsoid method, as well as testing the possibility of using the method using the figures of the second order of the ...
T. G. Aslanov, U. A. Musaeva
doaj   +1 more source

Retraction Note to: Estimation of the source process and forward simulation of long-period ground motion of the 2018 Hokkaido Eastern Iburi, Japan, earthquake

open access: yesEarth, Planets and Space, 2019
The authors have retracted this article [1] because after its publication, they noticed that the source inversion was not done with the intended setting. Although it was mentioned in this article [1] that the rupture starting point of the fault model was
Hisahiko Kubo   +4 more
doaj   +1 more source

Volcanic earthquake swarms at Izu-Oshima in 2023

open access: yesEarth, Planets and Space
Earthquake swarms are known to reflect underground fluid movement and stress changes. However, their occurrence patterns and the mechanisms underlying hypocenter migration remain poorly understood.
Hinako Arakawa, Naofumi Aso
doaj   +1 more source

INTERPRETING FAULT DYNAMICS IN TERMS OF HYPOCENTER RELOCATION AND FAULT CHARACTERIZATION

open access: yesГеодинамика и тектонофизика
Southeast and Central Sulawesi are the areas characterized by high tectonic activity due to the presence of the active Matano fault. The seismicity along this fault is high. However, the initial hypocenter often deviates from the fault’s trend line, thus
M. F. I. Massinai   +5 more
doaj   +1 more source

Numerical investigation of dilatancy biasing of hypocenter locations

open access: yesGeophysical Research Letters, 1975
We assume that a dilatant zone which develops as a precursor to an earthquake may be modeled by a zone of low‐velocity rock having the shape of a triaxial ellipsoid. For varying ellipsoid dimensions, velocity contrasts, and hypocenter distributions, we generate a synthetic data set of arrival times at surface stations.
Chee Wu, Robert S. Crosson
openaire   +1 more source

A New Robust Algorithm for Fault-Plane Parameters Identification: The 2009 L’Aquila (Central Italy) Seismic Sequence Case

open access: yesApplied Sciences
The study of the hypocenter distribution of seismic events related to fault structures is a crucial topic since it is linked to the geological features and to the dynamics of an investigated area.
Annarita Mangiacapra   +6 more
doaj   +1 more source

An approach for teleseismic location by automatically matching depth phase

open access: yesFrontiers in Earth Science
To deal with the low efficiency problem of accurate teleseismic hypocenter location, this paper proposes a fully automatic approach by integrating the advantages of Seismic-Scanning based on Navigated Automatic Phase-picking, which can automatically ...
Jianlong Yuan   +4 more
doaj   +1 more source

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