Тип публикации: статья из журнала
Год издания: 2021
Идентификатор DOI: 10.1051/e3sconf/202133302011
Аннотация: <jats:p>The aim of this work is to study gravitational anomalies that have arisen in the region of the sources of strong underwater earthquakes with a magnitude of M<jats:sub>w</jats:sub> > 8. For this purpose, data obtained by the GRACE space system were used. Variations of the <jats:italic>EWH</jats:italic> program with a period Показать полностьюof 30 days were investigated relative to the focal area of the 2011 Japanese earthquake for the period 2010-2012. It was found that during the preparation of an earthquake, the <jats:italic>EWH</jats:italic> values significantly increase in this area for three months, with aftershock activity, the <jats:italic>EWH</jats:italic> values decrease within a month. Maps of variations of the <jats:italic>EWH</jats:italic> parameter in the conditions of a disturbed geomedia and in background seismic conditions are constructed. The indices of the anomaly δ<jats:italic>EWH</jats:italic> were calculated, which made it possible to analyze in more detail the local gravitational field for the investigated focal zone.</jats:p>
Журнал: E3S Web of Conferences
Выпуск журнала: Т. 333
Номера страниц: 02011
ISSN журнала: 25550403
Место издания: Les Ulis
Издатель: EDP Sciences - Web of Conferences