 Complete the following phrase:  Lake Chichoj is located within 2 km of the Chixoy-Polochic fault, a major fault of the North America-Caribbean plate boundary, which constitutes the closest and largest seismic hazard for San Cristóbal Verapaz, but lies within a broader array of large to intermediate seismogenic faults. The latest noticeable earthquakes include a M 4.1 quake in 2006 on the Polochic fault and a M4.8 in June 2009 on a secondary fault, NW of the lake. The sediments of the lake host a rich record of disruptions produced by past earthquakes, most notably the M 7.8 