The correct statement about the earthquake is:
The earthquake was caused by plates moving together. It released a lot of energy, but the observer did not see much damage.
This aligns with the characteristics of an earthquake at a convergent boundary, where tectonic plates collide, often producing significant energy release and resulting in strong earthquakes. However, if an observer reports low intensity, it might indicate that the structural damage was minimal in that specific area, possibly due to factors such as distance from the epicenter or building resilience.