Geonet reported it happened just before 3pm and was centred in Cook Strait 40km north-east of Picton, 28km deep.
One person posted on X (formerly Twitter): “Yuck, that earthquake was like a truck hitting the house.”
Thousands reported feeling the shake.
Another person in Lower Hutt said on X that it gave them a fright: “Normally, I hear them coming, but that was a sudden, sharp jolt!”
Someone else said it was a “strong 4.6″ and their heart was still racing.