Earthquake 
26 Feb 1911 based at Blenheim?
Source: The Hawera and Normanby Star Monday 27 Feb 1911

 3.40am Blenheim
 3.42am Wairoa - no damage
 3.45am Christchurch, Masterton, Napier, Nelson, Pahiatua
 3.46am Gisborne

 Palmerston North: The most severe earthquake experienced
 here for some years was felt at 3.45 o'clock this morning.
 There were two shocks, the first of five seconds, and the
 second of eight seconds in duration. The shake was travelling
 from south-west to north-east. No damage was reported, though
 the shake considerably alarmed nervous people.

 Christchurch: A shock of earthquake was felt at an early hour
 this morning. There was more of a swaying motion than the
 usual jerk, but the shock was not severe enough to cause any
 damage.

 Masterton: It was more severe in some of the country districts,
 where two distint shocks were felt. No damage was done.