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Did four CT's and two ECT's results were similar across the board. Failure happened 50-60cm down on a layer where the snowpack consists of mostly faceted snow. Snow temp at weak layer was -1°C. The first ECT (photo provided) was preformed on SE aspect on a slope of 20°. It suddenly collapsed and propagated on E8 down 51cm. The second ECT was on an E aspect of 34°. It broke irregularly on M7 down 61cm. Did not propagate.