Residents in Tehran and elsewhere say the attacks come at all hours and rock the ground.
The South Pars gas field, hit by airstrikes on Wednesday, is central to the energy supply of Iran, which was already suffering blackouts before the war.
The attacks could worsen the severe electricity shortages that Iranians already face.
Near the center of Beirut, one image captures the aftermath of an Israeli strike.
The field is part of a vast gas reservoir shared by Iran and Qatar. The strike appeared to be one of the most significant attacks on an energy site since the U.S.-Israeli air war against Iran began.
The strikes appeared to be some of the most significant attacks on energy sites since the U.S.-Israeli air war against Iran began almost three weeks ago.
The Israeli military said on Wednesday that it had killed Esmaeil Khatib in an airstrike. Iran confirmed the killing.
The Israeli military widened its attacks to the districts in the center of the Lebanese capital, destroying buildings, forcing residents to flee and killing at least 10.
Israeli attacks have targeted the command centers of Iran’s repressive, internal security forces in hopes that Iranians will overthrow their rulers. Some see that as wishful thinking.
The deaths of two top Iranian officials were announced on Tuesday, while President Trump once again lashed out at NATO allies who refused to aid the U.S. war effort against Iran.