About 30 million years ago when the pacific plate first hit the north American plate
The fault that caused the Christchurch earthquake, specifically the Port Hills Fault, last moved during the significant earthquake that struck on February 22, 2011. This earthquake had a magnitude of 6.3 and resulted in widespread damage and loss of life in Christchurch, New Zealand. The fault movement during this event was part of the ongoing tectonic activity in the region.
Couple of months ago
stress builds up on a fault line over time and then releases all of the stress in an earthquake.
If you are calling a major earthquake anything near a 5 on the magnitude scale, there was a 4.9 on April 15, 2010 in Randolph, UT.
New Zealend last week.
Large earthquakes are relatively infrequent along the San Andreas Fault. They occur on average every 100-200 years, although the frequency can vary depending on the specific segment of the fault. The last major earthquake on the southern portion of the fault was the 1857 Fort Tejon earthquake.
When the San Andreas Fault does generate an earthquake over 7.5, the results will be cataclysmic.
The last large quake on the San Andreas was the 1989 Loma Prieta earthquake, magnitude 6.9.
The Christchurch fault line last experienced a significant movement during the 2011 earthquake in New Zealand, which caused widespread damage in the area. Since then, there have been smaller aftershocks, but no major movements have been reported recently.
Couple of months ago
Haiti
Haiti.
The Port Hills fault in New Zealand last significantly moved during the 2016 Kaikoura earthquake, which caused widespread damage in the region. This fault has been relatively inactive since then.
stress builds up on a fault line over time and then releases all of the stress in an earthquake.
The most recent significant California earthquake was the 1994 Northridge earthquake, magnitude 6.7, which killed around 60 people. The last earthquake above magnitude 7 in California was the 1999 Hector Mine earthquake, magnitude 7.1. There were no deaths due to it occurring in the middle of the Mojave desert.
If you are calling a major earthquake anything near a 5 on the magnitude scale, there was a 4.9 on April 15, 2010 in Randolph, UT.
Haiti and it was in February I think.