New Zealand has experienced a "short, sharp" magnitude 5.8 earthquake
People in parts of the South Island may have felt a slight rumble as the quake struck on Wednesday afternoon.
GeoNet initially had the quake as measuring 4.8M, but after a review said "the quake would not be widely felt".
Earlier, a 6.1 quake was recorded but its since been downgraded.
No tsunami warning has been issued.
This follows a 7.1 magnitude quake in Mexico City that has killed at least 139 people.