A moderate earthquake shook the top of the South Island early this morning.
The magnitude 4.5 quake struck just east of Seddon shortly before 4am.
![The quake was about 21km deep.](https://www.nzherald.co.nz/resizer/v2/GDOOE5FLX7YHCY6O44PBHL7IZI.jpg?auth=2d912f64c4ee27f37d78e5611be7dde1c239a166966cd6b4dd0bcb02d8da0001&width=16&height=10&quality=70&smart=true)
It was about 21km deep.
A few people woken by the quake took to Twitter after they were jolted awake.
The magnitude 4.5 quake struck just east of Seddon shortly before 4am. Photo / iStock
A moderate earthquake shook the top of the South Island early this morning.
The magnitude 4.5 quake struck just east of Seddon shortly before 4am.
It was about 21km deep.
A few people woken by the quake took to Twitter after they were jolted awake.
"Insomnia problem #29 feel every small earthquake of the wee hours. #eqnz" wrote Samantha Jane.
"Go away. I just want to sleep. #eqnz" another Twitter user wrote.