Fig. 4. Changes in strain and strain-rate alongside precipitation and soil moisture, with highlighted time periods of interest (sequences 1, 2, 3, and 5).

a Soil moisture content (purple) and precipitation data (blue). b Strain and strain-rate for DAS channel 989 at cable section 6 (easternmost). Yellow shading highlights Sequence 1. c Strain and strain-rate for DAS channel 1577 at cable section 4. Yellow shading highlights Sequence 2. d Strain and strain-rate for DAS channel 1625 at section 4. Yellow shading highlights increasing strain at the scarp. e Strain and strain-rate for DAS channel 1661 at cable section 5. Yellow shading highlights Sequence 5. f Inset of Fig. 4b to show the initial onset of strain observed at DAS channel 989, cable 6. Strain data is shown as black solid line and strain rate data is shown as gray solid line data. Approximate channel locations are indicated in Figs. 1, 2 with sequence numbering.