Earth, Planets and Space

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A simple method to evaluate the uncertainty of magnetotelluric forward modeling for practical three-dimensional conductivity structure models
Earth, Planets and Space - Tập 75 - Trang 1-17 - 2023
Kiyoshi Baba
The forward calculation of magnetotelluric (MT) responses is generally assumed to be sufficiently accurate compared with typical observational errors in practical modeling and inversion studies. Although the uncertainty of the forward calculation may be examined by comparison with analytical or other numerical solutions for some simple models, such an examination does not guarantee that the uncert...... hiện toàn bộ
Investigation of geomagnetic reference models based on the Iridium $$^{\circledR }$$ constellation
Earth, Planets and Space - Tập 74 - Trang 1-21 - 2022
Samuel Califf, Patrick Alken, Arnaud Chulliat, Brian Anderson, Kenneth Rock, Sarah Vines, Robin Barnes, Kan Liou
The World Magnetic Model (WMM) is a geomagnetic main field model that is widely used for navigation by governments, industry and the general public. In recent years, the model has been derived using high accuracy magnetometer data from the Swarm mission. This study explores the possibility of developing future WMMs in the post-Swarm era using data from the Iridium satellite constellation. Iridium ...... hiện toàn bộ
Special Issue “Global data systems for the study of solar-terrestrial variability”
Earth, Planets and Space - Tập 69 Số 1 - 2017
Takashi Watanabe, Toshihiko Iwamoto, K. Shiokawa, Jie Zhang, S. Kanekal, Н. Нишитани
Seismic and aseismic fault slip before and during the 2011 off the Pacific coast of Tohoku Earthquake
Earth, Planets and Space - Tập 63 - Trang 637-642 - 2011
Shin’ichi Miyazaki, Jeffery J. McGuire, Paul Segall
The March 11, 2011, off the Pacific coast of Tohoku Earthquake is the first great subduction zone earthquake to be recorded by a dense, modern network of geodetic quality Global Positioning System (GPS) receivers, and hence presents an unprecedented opportunity to study the evolution of fault slip during the time periods immediately before, during, and after a truly great earthquake. We utilized s...... hiện toàn bộ
Subsurface structures derived from receiver function analysis and relation to hypocenter distributions in the region from the eastern Shikoku to the northern Chugoku districts, Southwest Japan
Earth, Planets and Space - Tập 60 - Trang 573-579 - 2008
Tomotake Ueno, Takuo Shibutani, Kiyoshi Ito
We carried out receiver function imaging to estimate detailed configurations of the Philippine Sea (PHS) slab beneath the Shikoku and Chugoku districts and crustal structures in the region. We used two temporary seismic arrays with an average station spacing of about 10 km in the Chugoku district. Beneath Shikoku a clear northward dipping discontinuity at about 20–40 km depth was found, with other...... hiện toàn bộ
Space weather effects on the low latitude D-region ionosphere during solar minimum
Earth, Planets and Space - Tập 66 Số 1 - 2014
Abhikesh Kumar, Sushil Kumar
Variability in MLT dynamics and species concentrations as observed by WINDII
Earth, Planets and Space - Tập 51 Số 7-8 - Trang 845-853
G. G. Shepherd, Shengpan Zhang, Xialong Wang
Imaging-based observations of low-latitude auroras during 2001–2004 at Nayoro, Japan
Earth, Planets and Space - Tập 67 - Trang 1-11 - 2015
Hidehiko Suzuki, Haruka Chino, Yasuo Sano, Akira Kadokura, Mitsumu K Ejiri, Makoto Taguchi
Color images of six low-latitude auroral events observed using color digital cameras at Nayoro (142.5° E, 44.4° N), Hokkaido, Japan, from 2001 to 2004, were analyzed to determine the events’ locations and times of occurrence. Geographical azimuthal and elevation angles of the images’ pixels were determined precisely by using the positions of the stars captured in the images. Horizontal regions cov...... hiện toàn bộ
Chandler wobble: two more large phase jumps revealed
Earth, Planets and Space - Tập 62 - Trang 943-947 - 2011
Zinovy Malkin, Natalia Miller
Investigations of the anomalies in the Earth rotation, in particular, the polar motion components, play an important role in our understanding of the processes that drive changes in the Earth’s surface, interior, atmosphere, and ocean. This paper is primarily aimed at investigation of the Chandler wobble (CW) at the whole available 163-year interval to search for the major CW amplitude and phase v...... hiện toàn bộ
Calibration of the Ørsted vector magnetometer
Earth, Planets and Space - Tập 55 - Trang 11-18 - 2014
Nils Olsen, Lars Tøffner-Clausen, Terence J. Sabaka, Peter Brauer, Jose M. G. Merayo, John L. Jørgensen, J. M. Léger, Otto V. Nielsen, Fritz Primdahl, Torben Risbo
The vector fluxgate magnetometer of the Ørsted satellite is routinely calibrated by comparing its output with measurements of the absolute magnetic intensity from the Overhauser instrument, which is the second magnetometer of the satellite. We describe the method used for and the result obtained in that calibration. Using three years of data the agreement between the two magnetometers after calibr...... hiện toàn bộ
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