why can we feel earthquakes hundreds of miles away

Earthquakes can be felt hundreds of miles away primarily due to the geology of the area and the nature of seismic waves. In regions like the eastern United States, the rocks are older, cooler, and denser, which allows earthquake waves to travel farther with less energy loss compared to other regions with different geology. These dense rocks let the seismic waves propagate over greater distances, so even smaller earthquakes can be felt far from their source. Additionally, the intensity of shaking felt depends on the earthquake’s magnitude, the distance from the epicenter, and local soil conditions. Low-frequency seismic waves diminish less rapidly over distance than high-frequency ones, enabling people farther away to feel a rolling motion even if the jolt near the epicenter is sharp. Soft soils can also amplify shaking, making distant effects stronger in some locations. In summary, the ability to feel earthquakes far away is influenced by geological factors that allow seismic waves to travel efficiently, the earthquake's energy, and local ground conditions enhancing shaking sensation.