Earth, Planets and Space
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Relating gas ascent to eruption triggering for the April 27, 2016, White Island (Whakaari), New Zealand eruption sequence
Earth, Planets and Space - - 2018
Upward propagating tidal effects across the E- and F-regions of the ionosphere
Earth, Planets and Space - Tập 61 Số 4 - Trang 505-512 - 2009
Recent far-ultraviolet (FUV) observations of Earth have shown the remarkable spatial correspondence between the amplitude of non-migrating atmospheric tides originating in the troposphere and the density and morphology of the nighttime equatorial ionospheric anomaly (EIA). This is likely a result of the modulation of the E-region dynamo electric field in daytime by the tidal winds. FUV observation...... hiện toàn bộ
Data assimilation experiment of precipitable water vapor observed by a hyper-dense GNSS receiver network using a nested NHM-LETKF system
Earth, Planets and Space - Tập 70 - Trang 1-16 - 2018
We studied the assimilation of high-resolution precipitable water vapor (PWV) data derived from a hyper-dense global navigation satellite system network around Uji city, Kyoto, Japan, which had a mean inter-station distance of about 1.7 km. We focused on a heavy rainfall event that occurred on August 13–14, 2012, around Uji city. We employed a local ensemble transform Kalman filter as the data ass...... hiện toàn bộ
Retrieval of long-wave tsunami Green’s function from the cross-correlation of continuous ocean waves excited by far-field random noise sources on the basis of a first-order Born approximation
Earth, Planets and Space - Tập 64 - Trang 43-48 - 2012
We investigate the theoretical background for the retrieval of the tsunami Green’s function from the cross-correlation of continuous ocean waves. Considering that a tsunami is a long-wavelength ocean wave described by 2-D linear long-wave equations, and that the sea-bottom topography acts as a set of point-like scatterers, we use a first-order Born approximation in deriving the tsunami Green’s fun...... hiện toàn bộ
A case study of correspondence between Pc1 activity and ionospheric irregularities at polar latitudes
Earth, Planets and Space - Tập 72 - Trang 1-12 - 2020
A possible driver of precipitation of magnetospheric energetic electrons in the high-latitude atmosphere is represented by electromagnetic ion-cyclotron (EMIC) magnetospheric waves. The precipitating particles produce variations, by collision, in the ionized component of the atmosphere, altering its chemistry and electrical conductivity, with a significant impact on the atmospheric processes. In t...... hiện toàn bộ
Ionospheric hole behind an ascending rocket observed with a dense GPS array
Earth, Planets and Space - Tập 60 - Trang 235-239 - 2008
An ascending liquid-fuel rocket is known to make a hole in the ionosphere, or localized electron depletion, by leaving behind large amounts of neutral molecules (e.g. water) in the exhaust plume. Such a hole was made by the January 24, 2006 launch of an H-IIA rocket from Tanegashima, Southwestern Japan, and here we report its observation with a dense array of Global Positioning System receivers as...... hiện toàn bộ
1-D resistivity structures of the oceanic crust around the hydrothermal circulation system in the central Mariana Trough using Magnetometric Resistivity method
Earth, Planets and Space - Tập 57 - Trang 673-677 - 2014
We present preliminary results of an electromagnetic survey over a region of hydrothermal circulation in the spreading axis of the central Mariana Trough. The Magnetometric Resistivity (MMR) method is used to determine the electrical resistivity structure of the oceanic crust around the hydrothermal system. 1-D electrical resistivity structure is calculated from the relation between the amplitude ...... hiện toàn bộ
Call for Papers: Special Issue of Earth, Planets and Space (EPS) “Swarm Science Data Processing and Products—the Swarm Satellite Constellation Application and Research Facility, SCARF”
Earth, Planets and Space - Tập 64 - Trang 783-783 - 2015
Geomorphic features of surface ruptures associated with the 2016 Kumamoto earthquake in and around the downtown of Kumamoto City, and implications on triggered slip along active faults
Earth, Planets and Space - Tập 69 - Trang 1-12 - 2017
The ~30-km-long surface ruptures associated with the M
w 7.0 (M
j 7.3) earthquake at 01:25 JST on April 16 in Kumamoto Prefecture appeared along the previously mapped ~100-km-long active fault called the Futagawa-Hinagu fault zone (FHFZ). The surface ruptures appeared to have extended further west out of the main FHFZ into the Kumamoto Plain. Althoug...... hiện toàn bộ
Low-frequency and trend compensation of broadband seismograms
Earth, Planets and Space - Tập 64 - Trang e5-e8 - 2012
The present paper proposes a technique for low-frequency and trend compensation of broadband seismograms, which involves frequency-band broadening using digital filtering and background-trend compensation based on a Heaviside-type tilt signal estimated using a stochastic trend model. Applying this method to the east-west component of broadband seismograms, recorded using VSE355G3 broadband seismom...... hiện toàn bộ
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