scispace - formally typeset
Journal ArticleDOI

Subionospheric VLF signal perturbations possibly related to earthquakes

O. A. Molchanov, +1 more
- 01 Aug 1998 - 
- Vol. 103, Iss: 8, pp 17489-17504
Reads0
Chats0
TLDR
In this paper, the authors analyzed similar data during periods around 10 other great earthquakes (magnitude M>6) in order to understand the main features of such an effect.
Abstract: 
A likely VLF subionospheric signal effect related to seismic activity was first reported by Hayakawa et al. [1996a, b] in association with the great Kobe earthquake. We have analyzed similar data during periods around 10 other great earthquakes (magnitude M>6) in order to understand the main features of such an effect. The following characteristics emerged from our analysis: The effect appears as a transient oscillation with a 5- to 10-day period, which is initiated a few days before a large earthquake and decays over a few days to weeks after it. It is mainly related to crustal earthquakes. It appears when resonant atmospheric oscillations with periods in a range of 5–11 days exist before the earthquake. The seismic influence on the VLF signal is probably explained by the generation of long-period gravity waves during the earthquake process and their intensification at heights of 70–90 km.

read more

Citations
More filters
Journal ArticleDOI

Seismo‐ionospheric signatures prior to M≥6.0 Taiwan earthquakes

Jann-Yenq Liu, +4 more
- 01 Oct 2000 - 
TL;DR: In this article, the authors examined variations of the greatest plasma frequency in the ionosphere, foF2, recorded by the Chung-Li ionosonde (25.0° N, 121.1° E) before M≥6.0 earthquakes during 1994-1999.
Journal ArticleDOI

ELF and VLF radio waves

Richard Barr, +2 more
- 01 Nov 2000 - 
TL;DR: A review of developments in ELF and VLF radio-wave propagation research over the last 50 years of the Journal of Atmospheric and Solar-Terrestrial Physics can be found in this paper.
Journal ArticleDOI

Short-term earthquake prediction: Current status of seismo-electromagnetics

Seiya Uyeda, +2 more
- 29 May 2009 - 
TL;DR: In this article, the authors review some of the problems of non-seismic precursors in short-term earthquake prediction and highlight the need to reinforce seismometer networks.
Journal ArticleDOI

Modeling electromagnetic propagation in the Earth-ionosphere waveguide

Steven A. Cummer
- 01 Sep 2000 - 
TL;DR: In this article, a series of mode theory and FDTD simulations of propagation from lightning radiation in the Earth-ionosphere waveguide were performed to investigate the accuracy of these approximations.
Journal ArticleDOI

Charge Generation and Propagation in Igneous Rocks

Friedemann Freund, +1 more
- 01 May 2002 - 
TL;DR: In this article, it was shown that when dry gabbro and diorite cores are impacted at relatively low velocities, approximately 100 m/s, highly mobile charge carriers are generated in a small volume near the impact point.
References
More filters

An introduction to dynamic meteorology

James R. Holton
TL;DR: The instructor's manual to a work which introduces the fundamental principles of meteorology, explaining storm dynamics and the dynamics of climate and its global implications is described in this paper, where the authors present a detailed discussion of the relationship between meteorology and climate.
Journal ArticleDOI

Detection of a 40–50 Day Oscillation in the Zonal Wind in the Tropical Pacific

Roland A. Madden, +1 more
- 01 Jul 1971 - 
TL;DR: In this paper, a very pronounced maximum was noted in the co-spectrum of the 850- and 150-mb zonal wind components in the frequency range 0.0245-0.0190 day−1 (41-53 days period).
Journal ArticleDOI

Observations of the 40-50-day tropical oscillation - a review

Roland A. Madden, +1 more
- 01 May 1994 - 
TL;DR: The 40-50-day cyclone oscillation is the result of large-scale circulation cells oriented in the equatorial plane that move eastward from at least the Indian Ocean to the central Pacific as discussed by the authors.
Book

Electromagnetic Waves in Stratified Media

James R. Wait, +4 more
TL;DR: In this article, the authors provide the theoretical basis for a variety of applications of electromagnetic (radio) waves to communications, navigation, and remote sensing, and this book is based on fundamental research in electromagnetic wave propagation that James R. Wait performed in the Central Radio Propagation Laboratory (CRPL) of NBS from 1956 to 1962.

An introduction to dynamic meteorology

James R. Holton
TL;DR: The instructor's manual to a work which introduces the fundamental principles of meteorology, explaining storm dynamics and the dynamics of climate and its global implications is described in this article, where the authors present a detailed discussion of the relationship between meteorology and climate.