Strong aftershocks

There were more strong aftershocks off East Cape overnight following last week’s 7.1 earthquake, with a 5.7 at 3:19 am followed by a 5.3 at 5:01 am, plus a bunch of smaller earthquakes.

Here are the 5+ quakes in that region over the past week.

  • 5.7 – Thu, Sep 1 2016, 10:04:35 am, 100 km north-east of Te Araroa
  • 7.1 – Fri, Sep 2 2016, 4:37:55 am, 125 km north-east of Te Araroa
  • 6.2 – Fri, Sep 2 2016, 5:14:05 am, 110 km north-east of Te Araroa
  • 5.7 – Fri, Sep 2 2016, 7:18:28 am, 90 km north-east of Te Araroa
  • 6.0 – Fri, Sep 2 2016, 8:06:03 am, 125 km east of Te Araroa
  • 5.5 – Sat, Sep 3 2016, 4:30:10 pm, 70 km east of Te Araroa
  • 5.5 – Sun, Sep 4 2016, 1:30:26 am, 65 km east of Te Araroa
  • 5.1 – Mon, Sep 5 2016, 8:00:28 am, 55 km east of Te Araroa
  • 5.7 – Tue, Sep 6 2016, 3:19:01 am, 95 km north-east of Te Araroa
  • 5.3 – Tue, Sep 6 2016, 5:01:58 am, 95 km north-east of Te Araroa

There have also been many smaller quakes, about 15 greater than 2 so far this morning.

A map showing the pattern of quakes.

QuakeMapEastCape

Fortunately the bigger ones are all offshore. Hopefully this is all easing stresses in the Pacific/Australian plate collision.

There’s good reasons for New Zealand to be known as the Shaky Isles.

From Geonet:

deep_seismicity1

The pattern of deep earthquakes in New Zealand. The two subduction zones are clearly seen: under the North Island and at Fiordland.

There looks to be a big gap waiting for the big one, but shallow quakes are more spread:

shallow_seismicity

The pattern of shallow earthquakes in New Zealand. Although earthquakes are seen occurring along the junction of the two tectonic plates and also feature around the volcanic regions, they can occur anywhere in New Zealand.

Leave a comment

1 Comment

  1. Pickled Possum

     /  6th September 2016

    Yep There’s the reason I live in TTT not many if any quakes in my neighbour hood.
    I wonder how these quakes will effect the continental shelf Ranfurly Bank where the prehistoric monster fish Giant Bass Groper Hapuka Marlin Whales Kingfish live.
    That is a fishing Day trip you will never forget if you haven’t been, put it on your bucket list.

    Reply

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