👉 Microseismical is a term used in geology and earthquakes to describe an earthquake that occurs at a depth of less than 10 kilometers (6.2 miles) below the surface of the Earth. This type of earthquake can be classified as a "microseismic" or "mild seismic" because it is much smaller than a normal earthquake, typically ranging from magnitude 3 to 5. Microseismals are often associated with tectonic plates moving closer together or under