Movements of some temperate mudflows have been automatically monitored using modified water-level recorders. A complex variety of recorded movement patterns shows that pronounced accelerations and decelerations occur. Surges of movement of varying magnitude and relatively high rates of movement exceeding 2.8 m/hr may take place. Comparisons between rainfall data and movements suggest that rainfall has important effects on the behavior of temperate mudflows because pronounced accelerations of movement usually follow periods of rainfall, although surges may take place unaccompanied by heavy precipitation.

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