Вулканология и сейсмологияВулканология и сейсмология0203-0306The Russian Academy of Sciences1767010.31857/S0203-03062019679-84Research ArticleA project of creating atlas aftershocks of strong earthquakesGuglielmiA. V.zavyalov@ifz.ruZavyalovA. D.zavyalov@ifz.ruZotovO. D.zavyalov@ifz.ruInstitute of Physics of the Earth, Russian Academy of Sciences12112019679840911201909112019Copyright © 2019, Russian academy of sciences2019<p>The Omori Law, which describes the repeated underground shocks after a strong earthquake, is written in the form of a nonlinear differential equation. An idea of the focal deactivation coefficient after the main shock is introduced. Two advantages of the new wording of the Omori Law are given. Firstly, there is an interesting possibility to naturally take into account exogenous and endogenous triggers affecting the earthquake source. Endogenous triggers in the form of round-the-world seismic echo and free oscillations of the Earth, excited by the main shock, are especially noted. The second advantage is that the differential aftershock equation makes it possible to put the reverse problem of the earthquake source physics. The essence of the inverse problem is to determine the deactivation coefficient from the data on the observed aftershock frequency. Examples of inverse problem solution are given. The project of creation of the Atlas of aftershocks on the basis of the solution of the inverse problem of the source, cooling down after a strong earthquake is offered.</p>earthquake sourceaftershock equationdeactivation factortriggersround-the-world echoinverse problemочаг землетрясенияуравнение афтершоковкоэффициент деактивациитриггерыкругосветное эхообратная задача[Гульельми А.В. Закон Омори (из истории геофизики) // УФН. 2017. Т. 187. № 3. С. 343–348.][Гульельми А.В. Подбор эмпирических формул для афтершоков: К 150-летнему юбилею Фусакичи Омори // Доклад на Ученом Совете ИФЗ РАН 24 октября 2018.][Гульельми А.В., Завьялов А.Д. Закон Омори: к 150-летнему юбилею Фусакичи Омори // Вулканология и сейсмология. 2018. № 5. С. 67–72.][Гульельми А.В., Зотов О.Д. О скрытой околочасовой периодичности землетрясений // Физика Земли. 2013. № 1. С. 3–10.][Гульельми А.В., Зотов О.Д., Завьялов А.Д. Динамика афтершоков Суматра-Андаманского землетрясения // Физика Земли. 2014. № 1. С. 66–74.][Завьялов А.Д., Зотов О.Д., Клайн Б.И. Пространственно-временные структуры афтершоковых последовательностей // 5-ая Международная конференция “Триггерные эффекты в геосистемах”. Тезисы докладов. М.: ИДГ РАН, 2019. С. 72–73.][Зотов О.Д., Завьялов А.Д., Гульельми А.В., Лавров И.П. О возможном эффекте кругосветных поверхностных сейсмических волн в динамике повторных толчков сильных землетрясений // Физика Земли. 2018. № 1. С. 187–201.][Guglielmi A.V., Zavyalov A.D. The 150th Anniversary of Fusakichi Omori // European Seismological Commission 36th General Assembly, 2–7 September 2018. Valletta – Malta, 2018. P. 330.][Guglielmi A.V., Zavyalov A.D. The 150th Anniversary of Fusakichi Omori (1868–1923) // IASPEI Newsletter, September 2018. P. 5–6. http://ftp.iaspei.org/pub/newsletters/2018/2018-September.pdf][Guglielmi A.V., Zotov O.D., Zavyalov A.D. Aftershocks atlas: To the 150th anniversary of Fusakichi Omori // 12th International Conference and School “Problems of Geocosmos”. Book of Abstracts. St. Petersburg, Petrodvorets, October 8–12, 2018. St. Petersburg, 2018. P. 121.][Omori F. On the aftershocks of earthquake // J. Coll. Sci. Imp. Univ. Tokyo. 1894. V. 7. P. 111–200.][Utsu T. A statistical study on the occurrence of aftershocks // Geophys. Mag. 1961. V. 30. P. 521–605.][Utsu T., Ogata Y., Matsu'ura R.S. The centenary of the Omori formula for a decay law of aftershock activity // J. Phys. Earth. 1995. V. 43. P. 1–33.][Zavyalov A.D., Guglielmi A.V., Zotov O.D., Lavrov I.P. Deviation from the Omori law as the result of the trigger impact of round-the-world surface seismic waves on the source of strong earthquakes // International Symposium on Deep Earth Exploration (DEEP-2018). Beijing, China, October 24–26, 2018 // Acta Geologica Sinica (English Edition). 2018. V. 92. Supp. 1. P. 271.][Zotov O.D., Zavyalov A.D., Klain B.I. On the Spatial-Temporal Structure of Aftershock Sequences // Proceedings of the 12th Intl. School and Conference “Problems of Geocosmos”, October 08–12, 2018. St. Petersburg, 2018. P. 139.]