Probability distributions of f_tides (left) and λ₃ (right) in protoclump regions (green histograms) and random patches (orange histograms). In the left panel, vertical lines of different colors indicate the median of the corresponding distribution, 0.33 and −0.27 for protoclumps and random patches, respectively. The f_tides in protoclump regions are mostly positive, indicating substantial or fully compressive tides, while random patches mostly have f_tides < 0, indicating substantial stripping. In the right panel, λ₃ was scaled by 20 in order to separate negative and positive values and present them in a logarithmic scale. Negative values are actually − log(−20 · λ₃) (e.g., a value of −5 along the x-axis represents −10⁵ Gyr⁻¹). We note that λ₃ is positive almost exclusively in protoclump regions, and about ~25% of the protoclump regions have λ₃ > 0, implying fully compressive tides.