The data on the seismicity of the Earth in the second half of 2020 at the level of strong earthquakes with magnitudes mb≥6.0 are given according to the data of the Alert Service of the Geophysical Survey RAS. The review also includes information on 54 tangible earthquakes in Russia and five earthquakes in adjacent territories that were felt in the settlements of the Russian Federation. Two of 67 strong earthquakes of the Earth with mb≥6.0 for the period under consideration were registered in the territory of Russia. For 15 strong earthquakes, the Alert Service published Information Messages within one or two days after their occurrence, for 14 earthquakes the information on focal mechanisms is provided. The strongest earthquake of the Earth with MS=7.9 occurred on July, 22 in the region of the Alaska Peninsula. The maximum human casualties and material damage during the study period were the result of the catastrophic intraplate earthquake with MS=6.8, which occurred on October, 30 in the Aegean Sea, near the Samos Island. As a result of the earthquake, 117 people died, 1054 were injured. The strongest earthquake on the territory of Russia was the deep-focus one with mb=6.4, which took place on November, 30 in the Tatar Strait, separating Sakhalin Island from continental Eurasia. The crustal Bystrinsk earthquake on September, 21 with MS=5.2, which occurred in the area of Lake Baikal, was felt with a maximum intensity I=6–7 on the territory of Russia. Comparative analysis of the rate of seismic energy released in the Globe in 2010-2020 showed that its value in the second half of 2020, as well as for 2019-2020 on average, is one of the lowest for the eleven-year period and indicates a seismic calm, which should be replaced by a period of intensification of global seismic and deformation processes
An analysis of the seismicity of the Earth in the 2021 second half at the level of strong earthquakes with magnitudes mb≥6.0 according to the Alert Service of the Geophysical Survey RAS are given. Alsoadded information about 59 earthquakes in Russia and adjacent territories, felt in the settlements of the Russian Federation. For 26 strong earthquakes within one or two days after their occurrence, Information messages were publishing; information about the focal mechanisms was calculated and presented. During the period under review, there were two strongest earthquakes on the globe with MS=8.0 (Mw=8.2) and with MS=7.8 (Mw=8.3) occurred, respectively, on July 29 off the coast of Alaska and on August 12 in the area of the South Sandwich Islands. The largest loss of life and material damage during the study period was caused by a catastrophic earthquake with MS=7.3 (Mw=7.2) that occurred on August 14 in the southwest of Haiti. As a result of the earthquake, 2248 people were killed, more than 12 thousand people were injured, 329 people were missing. The strongest earthquake in Russia was on September 20 with MS=5.9 (Mw=6.2) east of the Kuril Islands. The highest intensity of shaking in Russia (5 points) was caused by earthquakes with mb=4.9 that occurred on October 20 in the Chechen Republic and on December 15 in the water area of Lake Baikal. The global seismic energy released in the 2021 second half remains, as in the previous two years, at a reduced level, relative to the average for the last 11.5 years, which indicates a continuing seismic calm.
An analysis of the seismicity of the Earth in the 2022 first half at the level of strong earthquakes with magnitudes mb≥6.0 according to the Alert Service of the Geophysical Survey RAS are given. In addition, added information about 59 earthquakes in Russia and adjacent territories, felt in the settlements of the Russian Federation. For 15 strong earthquakes within one or two days after their occurrence, Information messages were publishing; information about the focal mechanisms was calculated and presented. During the period under review, the strongest earthquake on the globe with MS=7.0 (Mw=7.3) occurred on March 16 on the east coast of Honshu Island, Japan. The greatest loss of life and material damage during the study period was caused by a catastrophic earthquake with MS=6.4 (Mw=6.1), which occurred on June 21 on the border of Afghanistan and Pakistan. Because of the earthquake, 1,500 people were killing and more than 2,000 people were injured. On the territory of Russia, the strongest earthquake was on April 24 with MS=5.8 (Mw=6.2) east of the Kuril Islands. With the greatest intensity of concussions (6 points) in the settlements of Russia, an earthquake was felt on June 8 with mb=5.4 (MS=5.2), which occurred in the water area of Lake Baikal. There was a sharp decrease in the seismic energy released in the first half of 2022 on the globe after a surge in the previous six months.
Аннотация. Представлен анализ работы Службы срочных донесений ФИЦ ЕГС РАН в I полугодии 2019 года. Описаны входные потоки информации, используемой для обработки землетрясений. Дано описание сводной обработки землетрясений, проходящей в три этапа, обмена данными ССД с международными сейсмологическими центрами. Проанализированы результаты оперативной обработки 2534 землетрясений мира в I полугодии 2019 года. Представлен обзор сейсмичности по данным ССД территории России и Мира за этот период.
Information is provided on the seismicity of the Earth at the level of mb≥6.0 in the 2022 second half, as well as on 66 earthquakes felt on the territory of the Russian Federation according to the to the Alert Service of the Geophysical Survey RAS. For the 15 most severe earthquakes, information messages were published within one or two days after their implementation, the parameters of the mechanisms of foci were calculated and given. During the period under review, the strongest earthquake on the globe with MS=7.8 (Mw=7.7) occurred on September 19 in the state of Michoacan, Mexico. The greatest human casualties and material damage were caused by a catastrophic earthquake with MS=5.3 (Mw=5.6), which occurred on November 21 on the island of Java, Indonesia. Because of the earthquake, 318 people were killing and more than 7,700 people were injured. On the territory of Russia, the strongest earthquake was on September 20 with MS=6.0 (Mw=6.1) in the area of the Commander Islands. The earthquake of December 8 with mb=5.6 (Mw=5.5), which occurred on the territory of the Republic of Dagestan, was felt with the greatest intensity of concussions (6 points) in the settlements of Russia. The seismic energy released on the globe for the 2022 second half (9.1⋅1016 J) increased after its minimum over the past 13 years (2010–2022), observed in the 2022 first half (2.76⋅1016 J), however, remained below the average value for 2010–2022 (2.31⋅1017 J).
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