A document by Lubor Ostrihansky. Click on the document to view its contents.

Abstract All earthquakes over 5th magnitude since 1962 were recorded on Sumatra and surroundings, marking their depths and distinguished whether they were triggered by maximum westward or north-southward tidal torques. Greatest differences were found in period 2003-2009 where earthquakes triggered by north-southward torque were situated on rim of Sumatra continental area on Mentawai Fault. Period 2009-2023 is characteristic by large number of westward tidally triggered earthquakes, situated westward from Sumatra coast reaching sometimes as far as into oceanic lithosphere. As far as the great earthquake M 9.1, 26.12.2004 was triggered by the beat of close tidal frequencies: 19 years Metonic cycle and Moon’s nodal 18.61 years variations and if the beat were symmetric with maximum amplitude 26.12.2004, then because Full Moon will be 27.12.2023 and New Moon 11.1.2024, (Moon’ declinations large +28.1º and -27.6º respectively), the earthquake will occur of 6.5 5th magnitude as similar earthquake 27.12.1985. This prediction has not been fulfilled because the beat has not been symmetric, but asymmetrically shifted by westward tidal torque as proved by absolutely missing earthquakes 25. and 26.12. 2023, documented by very sensitive earthquakes detection up to 2.5 magnitude.

Positions of earthquakes over 5 th magnitude were investigate in Taiwan region and adjacent Philippine Sea Plate. Purpose of this paper was to establish earthquakes tidal periods in range of Moon sidereal rotation cycle. Because sidereal Moon cycle reflects variation in length of day of Earth, positions of earthquakes on this graph stated positions on Moon's orbit and from it followed the tidal frequences knowing time. 849 earthquakes after declusterization were investigated in three time periods 1962-1982, 1983-2002 and 2003-2024. Histograms of earthquakes compiled for Moon crossing equator from south, reaching maximum Moon declination, reaching Moon equator from north and reaching maximum negative declination, presented tidal frequence 6.83 days, 13.66 days and their multiples. By this way stated earthquake occurrence periods are only 31.8 %, but remaining earthquakes have also tidal origin given tectonic position on Taiwan and cumulative action of northsouth and westward directing forces.

Positions of earthquakes over 5th magnitude were investigate in Taiwan region and adjacent Philippine Sea Plate. Purpose of this paper was to establish earthquakes tidal periods in range of Moon sidereal rotation cycle. Because sidereal Moon cycle reflects variation in length of day of Earth, positions of earthquakes on this graph stated positions on Moon’s orbit and from it followed the tidal frequences knowing time. 849 earthquakes after declusterization were investigated in three time periods 1962-1982, 1983-2002 and 2003-2024. Histograms of earthquakes compiled for Moon crossing equator from south, reaching maximum Moon declination, reaching Moon equator from north and reaching maximum negative declination, presented tidal frequence 6.83 days, 13.66 days and their multiples. By this way stated earthquake occurrence periods are only 31.8 %, but remaining earthquakes have also tidal origin given tectonic position on Taiwan and cumulative action of northsouth and westward directing forces.

First part of the paper is devoted to explanation of unusual WSW-ENE position of High Atlas belt. Explanation is given by permanent action of tides, which create folding of this belt and its permanent uplift up to high over 4000 m. Tidal origin of Marrakesh earthquake 2023 is proven by maximum Moon declination 27° 31.

A document by Lubor Ostrihansky. Click on the document to view its contents.

All earthquakes over 5 th magnitude since 1962 were recorded on Sumatra and surroundings , marking their depths and distinguished whether they were triggered by maximum westward or north-southward tidal torques. Greatest differences were found in period

In the paper double seismic zones are discussed as a phenomenon confirming penetration of oceanic lithosphere through the mantle as solid and extremely hard medium. Formation of such medium has been performed by solidification of Earth from core-mantle boundary upwards. Lower mantle formed under extremely high pressure prevents any earthquakes. Upper mantle is suitable for formation of embrittlement and earthquakes in double seismic zones. Continental lithosphere overriding oceanic lithosphere forms subducton zones firmly anchored in mantle. Deeply steeping subduction zones penetrate mantle burning its way by melting probably as far as through core-mantle boundary. Oceanic lithosphere grows in midocean ridges with half speed of the front of plate. Driving forces are tides. Movements of plates confirm hotspot tracks. Hotspots are probably of meteoric origin. They penetrate through mantle in same way as subducton zones. Material created in penetration moves upwards by buoyancy and during its subsidence creates hotspot tracks over 10 000 km, however their penetration as far as coremantle boundary is not proven.

Using confirmed long term tidal periodicities, it has been predicted that the next strong earthquake in South-Central Alaska, situated in narrow belt 149º-146ºW and 60º-65ºN will be in 2021, what has been fulfilled by earthquake Chickaloon May 31, 2021 M 6.

First, author explains that mantle convection is physically impossible as factor driving lithosphric plates. Considering all-important earthquakes on the Earth, author shows that tidal forces triggered them and that these forces are sufficient to drive plates, referring calculation in Appendix. Conclusion shows success of author's concept in correct earthquake prediction in firs time in history, prediction of earthquake in South-Central Alaska 2021.

The intermediate-depth earthquakes (~200 km) in Hindu Kush, Afghanistan were investigated to prove their origin by tides. An untraditional astronomical method has been used to prove how astronomical parameters influence triggering of earthquakes. In contrast to previous issues, where Moon hour angles were used, Moons declinations were used successfully to prove tidal origin of earthquakes. Maximum earthquakes have been recognized during minor lunar standstills, i.e.

First part of the paper deals with obscure imagination of mantle convection, which contradicts to any real observations. Geological maps clearly show plates rotation round South Pole and the opening of back-arc basins confirms plates westward movements. Common action of equator-fleeing force and tidal friction facilitates the plate movement westward and northward. Hotspots confirm plate movements and triple junction mantle convection excludes. Calculated north-south tidal torques and tidal friction torques state when earthquakes by tides can be triggered. Plate movement and earthquakes triggering are bound to the space released by subduction. Not all Full or New Moons are favorable for earthquake triggering; discarding can be caused by low tidal torques or Moon and Sun torques acting oppositely. For Earth’s rotation variations and for the plate movement the nodal Moon 18.61 years periodicity, sidereal Moon 27.56 days periodicity and their semidiurnal variations are important for earthquake triggering and earthquakes prediction.