Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science最新文献_第8页

Chemistry with stretched molecules 拉伸分子的化学

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 DOI: 10.1016/S1464-1917(01)00033-2

A.M. Wodtke

引用次数: 3

Large motion estimation by gradient technique - application to debris flow velocity field 梯度大运动估计技术在泥石流速度场中的应用

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 DOI: 10.1016/S1464-1917(01)00060-5

M.S. Uddin , H. Inaba , Y. Yoshida , Y. Itakura , M. Kasahara

引用次数: 8

Ionospheric profilers using data grids 使用数据网格的电离层剖面仪

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 DOI: 10.1016/S1464-1917(01)00002-2

R. Leitinger , B. Nava , G. Hochegger , S. Radicella

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引用次数: 11

The low-frequency seismic signal foregoing a main shock as a sign of the last stage of earthquake preparation or preliminary rupture 在主震之前的低频地震信号，作为地震准备的最后阶段或初步破裂的标志

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 DOI: 10.1016/S1464-1917(01)95024-X

E.V. Sassorova , B.W. Levin

{"title":"The low-frequency seismic signal foregoing a main shock as a sign of the last stage of earthquake preparation or preliminary rupture","authors":"E.V. Sassorova , B.W. Levin","doi":"10.1016/S1464-1917(01)95024-X","DOIUrl":"10.1016/S1464-1917(01)95024-X","url":null,"abstract":"<div><p>The existance of low-frequency foregoing signals (LFFS) just before the main shock was described by Ihmle and Jordan (1991, 1993, 1994), Brevdo (1998), Levin and Sassorova (1994, 1995, 2000), Umeda (1999). The LFFS may be considered as a local sign of the last stage of the earthquake preparation or as a signal of the preliminary rupture process which preceded the main shock. These signals have a period from 3 to 200 s and forecast time before P-wave arrival in area from 5s to 1.5 hours. The LFFS were detected only for the events with epicenter distance no more than 1000 km. The LFFS parameters depend on the regional characteristics (the oscillator size, features of the environment, structure of the Earth crust). The LFFS properties connected with the same region, such as a period, foregoing time duration, signal structure vary insignificantly. The classification of the foregoing signals was proposed and the connection between the signal type, and the event localization was noted. It was shown that faint seismic signals radiated from an earthquake source and acoustic signals preceded a rupture in laboratory experiments can be written by common empirical relationship (the dependence of the period of radiated waves on the size of oscillation zone). The dispersion law for the signal emitted by the destruction source area is suggested, based on the laboratory experiments and field observations.</p></div>","PeriodicalId":101026,"journal":{"name":"Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science","volume":"26 10","pages":"Pages 775-780"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1464-1917(01)95024-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83033051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Contents of volume 26 第二十六卷内容

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 DOI: 10.1016/S1464-1917(01)95029-9

引用次数: 0

FAST Observations of inertial alfvén waves and electron acceleration in the dayside aurora 昼侧极光中惯性alvsamn波和电子加速的FAST观测

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 DOI: 10.1016/S1464-1917(00)00108-2

C.C Chaston, W.J Peria, C.W Carlson, R.E Ergun, J.P McFadden

{"title":"FAST Observations of inertial alfvén waves and electron acceleration in the dayside aurora","authors":"C.C Chaston, W.J Peria, C.W Carlson, R.E Ergun, J.P McFadden","doi":"10.1016/S1464-1917(00)00108-2","DOIUrl":"10.1016/S1464-1917(00)00108-2","url":null,"abstract":"<div><p>A prevailing feature of small scale (k<sub>⊥</sub> c/ω<sub>pe</sub> ∼≥1) Alfven waves observed from the FAST spacecraft is an association of the impulsive wavefield with bursts of field-aligned electrons with energies of the order of <span><math><mtext>1</mtext><mtext>2</mtext></math></span>m<sub>e</sub>V<sup>2</sup><sub>A</sub>. The accelerated distributions have broad energy spectra up to a few 100 eV and are predominantly directed downwards although upward accelerated beams are sometimes observed. Observations show that the direction of acceleration is correlated with the direction of the wave Poynting flux and anti-correlated with the direction of the field-aligned current carried by the wave. The accelerated portion of the distribution in some cases carries all the field-aligned current since the thermal population is depleted. These observations are compared with the predictions of a 1-D MHD model (with an inertial correction) (Chaston, 2000) and a fluid-kinetic model (Clark and Seyler, 1999) for waveforms where k<sub>⊥</sub> c/ω<sub>pe</sub> ∼1 and k<sub>⊥</sub> c/ω<sub>pe</sub>>>1 respectively.</p></div>","PeriodicalId":101026,"journal":{"name":"Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science","volume":"26 1","pages":"Pages 201-205"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1464-1917(00)00108-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74133000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Evaluation of the ionospheric noise and variability within the hour by 5 minutes ionospheric soundings 用5分钟电离层探测评价一小时内的电离层噪声和变化

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 DOI: 10.1016/S1464-1917(01)00013-7

B. Zolesi , S.S. Kouris , D. Fotiadis , C. Scotto

引用次数: 2

Kinematic evolution and shear strength in the complex landslides of the Maratea valley (PZ, Italy) 意大利马拉蒂亚山谷复杂滑坡的运动演化与剪切强度

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 DOI: 10.1016/S1464-1917(01)00066-6

G. Toni , V. Rizzo

引用次数: 1

Cusp energetic particles observed by INTERBALL-tail probe in 1996 1996年interball尾部探测器观测到的尖高能粒子

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 DOI: 10.1016/S1464-1917(00)00115-X

N.F. Pissarenko , I.P. Kirpichev , V.N. Lutsenko , S.P. Savin , E.Yu. Budnick , A.R. Moszhukina , E.I. Morozova , A.E. Antonova , I. Sandahl

引用次数: 14

The connection between auroral acceleration and auroral morphology 极光加速与极光形态的关系

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 DOI: 10.1016/S1464-1917(00)00104-5

T.J. Hallinan, H.C. Stenbaek-Nielsen

{"title":"The connection between auroral acceleration and auroral morphology","authors":"T.J. Hallinan, H.C. Stenbaek-Nielsen","doi":"10.1016/S1464-1917(00)00104-5","DOIUrl":"10.1016/S1464-1917(00)00104-5","url":null,"abstract":"<div><p>Auroral acceleration is usually conceived in terms of measured electron energy-spectra and pitch-angle distributions. But another historical thread draws upon studies of auroral morphology. By 1970 it had been discovered that the rays in active rayed arcs are actually arrays of vortices similar to those observed in fluid shear and in laboratory experiments involving magnetized sheet electron beams (Kelvin-Helmholtz instability). The apparent shear flow implied that rays drift at the E X B velocity in a convergent electric field of the order of 1 v/m. But ionospheric electric fields rarely exceeded 100 mV/m. A suggested solution, that the electric fields existed in the source region but did not map down to the lower ionosphere, required that there be an upward electric field in the center of the arc. This field would accelerate electrons downward into the ionosphere. To compare electric fields inferred from inverted V energy with those inferred from ray motions requires a fortunate conjunction of a rocket or satellite passing through an overhead rayed arc. The AMICIST payload provided such an opportunity and the inferred fields were consistent. Morphology studies also show that clockwise spirals, associated with upward currents and counter-clockwise curls, associated with charge sheets, have scale-sizes differing by two orders of magnitude. This suggests that current sheets have thickness of order 50 km (multiple arc) while negative charge tends to be concentrated in thin layers of order 500m (arc elements). This difference needs to be considered in relating parallel fields to Birkeland currents. Finally, conjugate studies of auroras suggest that the potential contours close somewhere above the acceleration region rather than in the conjugate ionosphere. This raises the question of how electrons are forced into the regions of high negative potential.</p></div>","PeriodicalId":101026,"journal":{"name":"Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science","volume":"26 1","pages":"Pages 169-177"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1464-1917(00)00104-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85252627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8