منابع مشابه
Geoelectric potential changes: possible precursors to earthquakes in Japan.
Whether electromagnetic precursors to earthquakes (EQs) exist is an important question not only for EQ prediction but also for understanding the physical processes of EQ generation. Slow transient geoelectric potential changes have been observed before several recent EQs in Japan. In most cases, they appeared 1-19 days before the EQs, and their duration and intensity were several minutes to 1 h...
متن کاملDetection of hydrothermal precursors to large northern california earthquakes.
During the period 1973 to 1991 the interval between eruptions from a periodic geyser in Northern California exhibited precursory variations 1 to 3 days before the three largest earthquakes within a 250-kilometer radius of the geyser. These include the magnitude 7.1 Loma Prieta earthquake of 18 October 1989 for which a similar preseismic signal was recorded by a strainmeter located halfway betwe...
متن کاملAuxin Transport and Geoelectric Potential in Corn Coleoptile Sections.
Asyximmetry of ildoleacetic aci(l distribution has lbeen associated witlh the (levelollment of plant bioelectric l)otentials. In the absenlce of auxinl. no detectable l)otential (levelops, but wvhen atuxin is suppliedl auxin asymmlletries cause(l by(lifferelnces in translport give rise to bioelectric potelntials (4. 6). Recenltlv (2) it \-as demonistrate(d that uinder anoxia. vhere no potential...
متن کاملPossible mechanisms for glacial earthquakes
[1] The large glacial earthquakes reported on by Ekström et al. (2003, 2006) and Tsai and Ekström (2007) have previously been evaluated in terms of their seismic characteristics. In this paper we attempt to take constraints such as known glacial ice properties, outlet glacier size, calving style, and meltwater variability to construct a self-consistent physical model of the glacial earthquake p...
متن کاملPossible seasonality in large deep-focus earthquakes
Large deep-focus earthquakes (magnitude> 7.0, depth> 500 km) have exhibited strong seasonality in their occurrence times since the beginning of global earthquake catalogs. Of 60 such events from 1900 to the present, 42 have occurred in the middle half of each year. The seasonality appears strongest in the northwest Pacific subduction zones and weakest in the Tonga region. Taken at face value, t...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2000
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.97.9.4561