No, a 10.0 magnitude earthquake is not considered possible according to the current understanding of earthquake science. The moment magnitude scale (often referred to as the Richter scale) is used to measure the size or magnitude of an earthquake. The scale is logarithmic, meaning that each whole number increase on the scale represents a tenfold increase in the amplitude of ground shaking and about 31.6 times more energy release.
The most powerful earthquake ever recorded was the 1960 Valdivia earthquake in Chile, which had a magnitude of 9.5. This earthquake released an immense amount of energy and caused significant damage and loss of life. Earthquakes with magnitudes above 9.0 are extremely rare and represent some of the strongest earthquakes known to occur.
Based on current scientific knowledge, it is not believed that earthquakes with magnitudes of 10.0 or higher are physically possible. The energy required to generate such a seismic event would be astronomically high and exceed the capabilities of the Earth's tectonic systems.
It's important to note that while a 10.0 magnitude earthquake is not considered possible, even lower magnitude earthquakes can still be destructive and have significant impacts depending on factors such as depth, proximity to populated areas, and local geological conditions.