There is a direct correlation between the earthquake’s magnitude and its depth in how we feel them. The deeper it is, which can occur as shallow as 8 miles (13 km) deep all the way to 316 miles (500 km) deep, the less we feel it.
So while a magnitude 4 is something most of us would normally sleep through on any given day (especially for those of us used to them), a shallow magnitude 4 would definitely knock over a tree (assuming it was above the epicenter).
There is a direct correlation between the earthquake’s magnitude and its depth in how we feel them. The deeper it is, which can occur as shallow as 8 miles (13 km) deep all the way to 316 miles (500 km) deep, the less we feel it.
So while a magnitude 4 is something most of us would normally sleep through on any given day (especially for those of us used to them), a shallow magnitude 4 would definitely knock over a tree (assuming it was above the epicenter).
edit, further reading: https://www.usgs.gov/faqs/what-magnitude-does-damage-begin-occur-earthquake