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Chronology of Events in 2007 at Nazko Cone |
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At this time, there is no evidence to suggest a volcanic eruption is likely. Monitoring of the situation continues, and updates will be provided as new information comes available.
November 15: Seismic activity, which began October 9, continues 20 km to the west of Nazko Cone (and 100 km west of Quesnel) in central BC. During the past week the rate of discrete earthquakes has decreased to fewer than about 10 events per day, however, periods of spasmodic bursts (many tiny earthquakes superimposed on top of each other) are being detected, suggesting magma moving deep underground (25 km). In total, more than 1000 microearthquakes have been recorded since this swarm began.
October 26: Seismic activity, which began October 9, continues 20 km to the west of Nazko Cone (and 100 km west of Quesnel) in central BC. In total, more than 400 microearthquakes have been recorded since this swarm began.
October 23: Seismic activity, which began October 9, continues 20 km to the west of Nazko Cone (and 100 km west of Quesnel) in central BC. Based on the number, size and location of the seismic events, there is no evidence at this time to indicate that a volcanic eruption is likely, thus there is no threat to public safety. Analysis of the data suggests that magma (liquid rock) is intruding deep in the earth's crust in the general region of Nazko, and is the likely cause of this seismic activity. To provide the best monitoring of the ongoing activity, NRCan has installed five additional seismic stations in the area, and will continue to monitor the situation closely. If magma were to ascend towards the surface, it is anticipated that the size and number of earthquakes would increase significantly, providing a warning in the unlikely event of an eruption. If an eruption were to occur, it is our expectation that it would be a small cone building event, similar to the Nazko eruption that took place about 7000 years ago.
October 22: The microearthquake swarm in the Upper Baezaeko River region continued at a similar rate over the weekend.
October 19: The microearthquake swarm in the Upper Baezaeko River region continues. There have been 28 events in the 12 hours prior to noon today.
October 15: Starting on October 10 an interesting series of earthquakes has been occurring in the upper Baezaeko River region, about 100km west of Quesnel, BC. More than 100 microearthquakes have occurred in this earthquake swarm as of 8 a.m. PDT October 15. These earthquakes are deep in the Earth's crust and none have been reported felt. This region is a known volcanic zone. The earthquakes are located about 20 km to the west of Nazko Cone which last erupted about 7000 years ago. These earthquakes may be related to magma movement at depth, or they may be related to crustal stresses.
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