{There was a great earthquake} (seismos egeneto megas).
Clearly not the earthquake of  27:51 . The precise time of this
earthquake is not given. It was before sunrise on the first day
of the week when the women made the next visit. Matthew alone
relates the coming of the angel of the Lord who rolled away the
stone and was sitting upon it (apekulise ton lithon kai ekath(8874)o
epan(9320)autou). If one is querulous about these supernatural
phenomena, he should reflect that the Resurrection of Jesus is
one of the great supernatural events of all time. Cornelius (850a)Lapide dares to say: "The earth, which trembled with sorrow at
the Death of Christ as it were leaped for joy at His
Resurrection." The Angel of the Lord announced the Incarnation of
the Son of God and also His Resurrection from the grave. There
are apparent inconsistencies in the various narratives of the
Resurrection and the appearances of the Risen Christ. We do not
know enough of the details to be able to reconcile them. But the
very variations strengthen the independent witness to the
essential fact that Jesus rose from the grave. Let each writer
give his own account in his own way. The stone was rolled away
not to let the Lord out, but to let the women in to prove the
fact of the empty tomb (McNeile).