排序方式： 共有13条查询结果，搜索用时 15 毫秒
1.
Investigated is the periodic component of geoacoustic emission within the frequency band from 2.0 to 6.5 kHz registered by the piezoceramic hydrophone installed near the bottom of Lake Mikizha in the Kamchatka Peninsula. It is revealed that the variation period is 24 hours and the maximum variation is observed in summer, when the average daily air temperature is above 10°C. In that period the close connection is revealed between the series of air temperature and geoacoustic emission. Taking into account the similar results of measurements of the ground surface slope at the observation site, the most probable reason for the diurnal variations of high-frequency geoacoustic emission is the deformation of near-surface sedimentary rocks caused by diurnal variations of temperature. 相似文献
2.
Changes in the directionality of surface high-frequency geoacoustic emission during periods of deformational disturbances
on the diurnal time scale prior to strong seismic events on Kamchatka have been investigated. It has been shown that while
the emission intensity grows by over an order of magnitude, sharp maxima appear in the direction of longitudinal acoustic
oscillations. Based on their position, the orientation of the major compression axis can be determined, whose chaotic motion
exhibits two metastable states around the direction to the epicenter of the earthquake. 相似文献
3.
G. I. Druzhin Yu. V. Marapulets N. V. Cherneva A. Yu. Isaev A. A. Solodchuk 《Doklady Earth Sciences》2017,472(2):215-219
In 2013, simultaneous observations of acoustic and electromagnetic emissions ranging from 200 Hz to 11 kHz were carried out in Kamchatka; as a result, abnormal surges of the emissions were registered 1–2 days before seismic events with magnitudes M LH ≥ 5 at a hypocentral distance up to 200 km. The most likely cause of the occurrence of the abnormal emissions in inherently different fields was activation of deformation processes preceding the earthquakes. 相似文献
4.
Rulenko O. P. Marapulets Yu. V. Kuz’min Yu. D. Solodchuk A. A. 《Izvestiya Physics of the Solid Earth》2019,55(5):766-776
Izvestiya, Physics of the Solid Earth - Based on the integration and analysis of the published theoretical results and field observations, the possibility is considered of a joint perturbation in... 相似文献
5.
6.
Yu. V. Marapulets O. P. Rulenko M. A. Mishchenko B. M. Shevtsov 《Doklady Earth Sciences》2010,431(1):361-364
In July–October 2006 and 2007, combined measurements of geoacoustic emission in the range of 2.0–6.5 kHz, the electric field
in the atmosphere near the ground, and meteorological values were carried out in Kamchatka. Using the nonparametric method
of Spearman’s correlation analysis, the relationship between their average hourly values was examined. After excluding results
of bad weather (rain, strong and moderate wind, low atmospheric pressure), a highly important negative relation between disturbances
in geoacoustic emission and the electric field were detected. Most probably, it was caused by amplification of the strain
of near-surface sedimentary rocks at the observation point during a seismotectonic process. The revealed relation is evidence
for another manifestation of the lithosphere’s influence on surface atmosphere in a seismoactive region. 相似文献
7.
8.
A. V. Kuptsov Yu. V. Marapulets M. A. Mishchenko O. P. Rulenko B. M. Shevtsov A. O. Shcherbina 《Journal of Volcanology and Seismology》2007,1(5):349-353
A field instrument package was installed for synchronous measurements of acoustic emission in rocks at frequencies of 0.1–10000 Hz and the vertical gradient of electric potential in near-ground atmosphere. These investigations for the first time revealed a relationship between emission disturbances in the kilohertz frequency range due to deformation of near-surface rocks and the electric field. The relationship may be observed both during seismically quiet periods and at the final phase of earthquake precursory periods. 相似文献
9.
Yu. V. Marapulets O. P. Rulenko I. A. Larionov M. A. Mishchenko 《Doklady Earth Sciences》2011,440(1):1349-1352
During the period of October 1–18, 2009, 41 km southwest of Petropavlovsk-Kamchatsky, in the intersection zone of tectonic
faults of various orders, simultaneous recording of the geoacoustic emission, gradient of the atmospheric electric field’s
potential, strains of the Earth’s surface, atmospheric pressure, wind speed, and rain intensity was made. It was found for
the first time that anomalous disturbances of high-frequency geoacoustic emission and atmospheric electric field near the
Earth’s surface originate as a simultaneous response to extension of near-surface sedimentary rocks. In the case of compression,
only disturbances of geoacoustic emission occur. Anomalies were recorded under quiet weather conditions and with rocks strains
being two orders greater than those of tidal ones. 相似文献
10.