Distribution of Nitrogen-Vacancy NV– Centers in Cubic Diamond Crystals from Anabar Placers as Revealed By ODMR and PL Tomography

Doklady Earth Sciences - Nitrogen-vacancy NV– centers, which are of considerable interest for quantum electronics, are artificially produced in the diamond structure by irradiation and...     

The Law of the Repeatability of the Number of Aftershocks

Doklady Earth Sciences - This paper shows that the number of aftershocks with a relative magnitude does not depend on the magnitude of the main shock, and, in global and regional consideration, it...     

Neotectonics and recent uplift at Kamchatka and Aleutian arc junction, Kamchatka Cape area, NE Russia

The tectonic position of the Kamchatka Cape Peninsula at the junction of the active Kuril–Kamchatka and Aleutian arcs exposes the coastline of the peninsula to strong neotectonic activities. Fracture zones have variable influence on uplift of the Kamchatka Cape Peninsula. Relevant morphologic indicators of neotectonic activity are multilevel, highly uplifted marine terraces and terraces displaced along active faults. Recent uplift rates of coastal sediments are determined by remote sensing via ASTER and SRTM DEM combined with optically stimulated luminescence dating (OSL). On the Kamchatka Cape Peninsula, terraces from the same generation are mapped at different elevations by remote sensing methods. After defining different areas of uplifted terraces, four neotectonic blocks are identified. According to apatite fission track data, the mean differential exhumation rates range from 0.2 to 1.2 mm year^?1 across the blocks since Late Miocene. The OSL data presented point to significant higher uplift rates of up to 3 ± 0.5 and 4.3 ± 1 mm year^?1, which indicates an acceleration of the vertical movement along the coast of Kamchatka Cape Peninsula in Upper Pleistocene and Holocene times.     

Spatial Distribution of Triggered Earthquakes in the Conditions of Mining-Induced Seismicity

Izvestiya, Physics of the Solid Earth - Abstract—The spatial distribution of the triggered seismic events in mining conditions in the tectonically loaded rock masses is studied using the...     

Lower Devonian conodont zonation in arctic regions of Eurasia

The evolution of viewpoints on the Lower Devonian conodont zonal stratigraphy in Arctic regions of Eurasia is considered. The morphophylogenetic analysis of the Early Devonian conodonts is used to elaborate the Lower Devonian conodont zonation.     

Experience of Simultaneous Measurements of Parameters of Currents and Hydrological Structure of Water from a Moving Vessel

Oceanology - At the Black Sea research site Gelendzhik of the Shirshov Institute of Oceanology (IO RAS), a technique has been established for joint current velocity profile measurements using towed...     

The Fault System Controlling Methane Seeps on the Shelf of the Laptev Sea

Doklady Earth Sciences - The paper presents data obtained during the 69th and 72nd expeditions of the research vessel Akademik Mstislav Keldysh (2017, 2018). A mechanism of methane discharge that...     

Sedimentogenesis cyclicity, stages, and phases in the development of the Late Silurian-Early Devonian biota in Northeast Asia

It is established that the Pridolian-Eifelian megacycle in Northeast Asia is represented by five macrocyclites. The analysis of fossils in Upper Silurian-Lower Devonian sections of the region reveals ten levels marked by large-scale reorganizations in the composition and structure of the biota in this basin. These levels are united in pairs by five maximums, which are characterized by the highest values of the taxonomic renewal coefficient, coincide with the boundaries of macrocyclites, and are traceable through the entire sedimentation basin.     

Long-term longitudinal asymmetries in sunspot activity: Difference between the ascending and descending phase of the solar cycle

We study the longitudinal distribution of sunspot activity in 1917–1995 using vector sums of sunspot areas. The vector sum of sunspots of one solar rotation gives a total vector whose amplitude characterizes the size of longitudinal asymmetry and whose phase describes the location of the momentarily dominating longitude. We find that when the phase distributions are calculated separately for the ascending phase and maximum (AM) on the one hand and for the declining phase and minimum (DM) on the other hand, they behave differently and depict broad maxima around roughly opposite longitudes. While the maximum of the phase distribution for the AM period is found around the Carrington longitude of 180°, the maximum for the DM period is at the longitude of about 0°. This difference can be seen in both solar hemispheres, but it is more pronounced in the southern hemisphere where the phase distribution has a particularly clear pattern. No other division of data into two intervals leads to similar systematic differences.