Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
List of earthquakes in 1961
Table title:
By magnitude
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Rank </th><th colspan=1 rowspan=1 > Magnitude </th><th colspan=1 rowspan=1 > Death toll </th><th colspan=1 rowspan=1 > Location </th><th colspan=1 rowspan=1 > Depth (km) </th><th colspan=1 rowspan=1 > Date </th></tr>
<tr> <td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 7.6 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > Peru Madre de Dios Region, Peru </td><td colspan=1 rowspan=1 > 612.2 </td><td colspan=1 rowspan=1 > August 19 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > 7.5 </td><td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > Japan Miyazaki Prefecture, Kyushu, Japan </td><td colspan=1 rowspan=1 > 35.0 </td><td colspan=1 rowspan=1 > February 26 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > 7.5 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > Peru Ucayali Region, Peru </td><td colspan=1 rowspan=1 > 619.9 </td><td colspan=1 rowspan=1 > August 31 </td></tr>
<tr> <td colspan=1 rowspan=1 > 3 </td><td class="highlighted"  colspan=1 rowspan=1 > 7.4 </td><td colspan=1 rowspan=1 > 0 </td><td class="highlighted"  colspan=1 rowspan=1 > New Zealand Kermadec Islands, New Zealand </td><td class="highlighted"  colspan=1 rowspan=1 > 421.1 </td><td class="highlighted"  colspan=1 rowspan=1 > June 18 </td></tr>
<tr> <td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 > 7.3 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > Indonesia Gulf of Tomini, Indonesia </td><td colspan=1 rowspan=1 > 144.8 </td><td colspan=1 rowspan=1 > March 28 </td></tr>
<tr> <td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 > 7.3 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > Vanuatu Vanuatu </td><td colspan=1 rowspan=1 > 25.0 </td><td colspan=1 rowspan=1 > July 23 </td></tr>
<tr> <td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 > 7.3 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > United Kingdom South Sandwich Islands </td><td colspan=1 rowspan=1 > 129.2 </td><td colspan=1 rowspan=1 > September 1 </td></tr>
<tr> <td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > 7.2 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > Japan off the east coast of Honshu, Japan </td><td colspan=1 rowspan=1 > 30.0 </td><td colspan=1 rowspan=1 > January 16 </td></tr>
<tr> <td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > 7.2 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > Peru Madre de Dios Region, Peru </td><td colspan=1 rowspan=1 > 597.5 </td><td colspan=1 rowspan=1 > August 31 </td></tr>
<tr> <td colspan=1 rowspan=1 > 6 </td><td colspan=1 rowspan=1 > 7.1 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > Japan eastern Hokkaido, Japan </td><td colspan=1 rowspan=1 > 43.9 </td><td colspan=1 rowspan=1 > August 11 </td></tr>
<tr> <td colspan=1 rowspan=1 > 6 </td><td colspan=1 rowspan=1 > 7.1 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > United Kingdom South Sandwich Islands </td><td colspan=1 rowspan=1 > 100.9 </td><td colspan=1 rowspan=1 > September 8 </td></tr>
<tr> <td colspan=1 rowspan=1 > 7 </td><td colspan=1 rowspan=1 > 7.0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > Japan off the east coast of Honshu, Japan </td><td colspan=1 rowspan=1 > 30.0 </td><td colspan=1 rowspan=1 > January 16 </td></tr>
<tr> <td colspan=1 rowspan=1 > 7 </td><td colspan=1 rowspan=1 > 7.0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > New Zealand Kermadec Islands, New Zealand </td><td colspan=1 rowspan=1 > 30.0 </td><td colspan=1 rowspan=1 > March 7 </td></tr>
<tr> <td colspan=1 rowspan=1 > 7 </td><td colspan=1 rowspan=1 > 7.0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > China southern Xinjiang Province, China </td><td colspan=1 rowspan=1 > 35.0 </td><td colspan=1 rowspan=1 > April 13 </td></tr>
<tr> <td colspan=1 rowspan=1 > 7 </td><td colspan=1 rowspan=1 > 7.0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > Japan Ryukyu Islands, Japan </td><td colspan=1 rowspan=1 > 30.6 </td><td colspan=1 rowspan=1 > July 18 </td></tr>
</table>
Question:
What happened to New Zealand on June 18?
Answer:
A magnitude 7.4 earthquake struck the Kermadec Islands, New Zealand on June 18 at a depth of 421.1 km.