1 Samuel 14:15

in the host, in the field In the camp in the field, the main army as distinguished from the outpost which Jonathan had attacked.

the earth quaked Perhaps this only describes the tumult and confusion of the Philistine host (cp. 1 Samuel 4:5), but possibly an earthquake augmented the general panic, as at the Exodus (Psalms 77:18). Cp. the storm at Ebenezer (ch. 1 Samuel 7:10).

so it was a very great trembling Lit. "And it became a trembling of God," i.e. a supernatural panic inspired by God. Cp. 2 Kings 7:6.