The most significant earthquake in last 30 days measuring 7 on Richter scale struck Kermadec Islands region in New Zealand on March 16, as per USGS. A 6.9-magnitude earthquake had struck the area on March 4. A 6.9-magnitude earthquake struck Tajikistan on February 23, while a 6.8-magnitude earthquake struck Ecuador on March 18. A 6.5-magnitude earthquake struck Afghanistan on Tuesday.