おすすめの記事


  • おすすめの記事
  • 2023.08.05

[Frontier Letter] Unified approach for evaluation of horizontal site amplification factors with special reference to history of studies on the effects of surface geology on seismic motion

Following the 1923 Kanto earthquake in Japan, Japanese researchers noticed strong effects of surface geology (ESG) on seismic motion and began to quantify the site amplification factors (SAFs) associated with soft surface sediments. Kawase et al. (20… もっと読む

  • おすすめの記事
  • 2023.05.08

[Frontier Letter] New GEONET analysis strategy at GSI: daily coordinates of over 1300 GNSS CORS in Japan throughout the last quarter century

Takamatsu et al. (2023) reprocesses the daily station coordinates of Japan's GNSS observation network "GEONET" since 1996 based on the newly developed analysis strategy "F5". Processing under the global baseline network, they achieve millimeter level… もっと読む

  • おすすめの記事
  • 2023.05.08

[Frontier Letter] Variations of the surface characteristics of Ryugu returned samples

The Planetary Material Sample Curation Facility3 of JAXA is responsible for initial description of valuable returned samples, publication of catalog data2, sample storage, and sample distribution to researchers worldwide. As part of curatorial works,… もっと読む

  • おすすめの記事
  • 2022.08.18

[Frontier Letter] Topside equatorial spread F-related field-aligned Poynting flux: observations and simulations

Equatorial spread F (ESF) occurs globally at low magnetic latitudes in the Earth’s nighttime ionosphere. ESF is well-known for its adverse effect on the propagation of radio waves affecting navigation, telecommunication, and scientific satellite syst… もっと読む

  • おすすめの記事
  • 2021.10.28

[Frontier Letter] Wave–particle interaction effects in the Van Allen belts

When we gaze out on the distant universe, we see billions of galaxies and we also see hundreds of billions of stars in our own galaxy, the Milky Way. Whether we observe in the narrow wavelength band accessible to our human eyes, or we expand our visi… もっと読む

  • おすすめの記事
  • 2021.10.26

[Frontier Letter] Physics-based secular variation candidate models for the IGRF

Fournier et al. (2021) report on physics-based secular variation forecasts for the international geomagnetic reference field (IGRF). Analysis of satellite data from 2000 onwards reveals that IGRF forecasts are worse at times of fast geomagnetic chang… もっと読む

  • おすすめの記事
  • 2021.10.26

[Frontier Letter] A quest for unrest in multiparameter observations at Whakaari/White Island volcano, New Zealand 2007–2018

Caudron et al. (2021) explores the seismic data associated with unrest and eruptions which occurred at Whakaari/White Island volcano in New Zealand for the last ~15 years. Using novel proxies taking advantage of continuous seismic records complemente… もっと読む

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