Table 2.
Vesicularity data in LP magma for the 2019 paroxysmal eruptions.
| Paroxysm date | 3 July 2019 | 28 August 2019 | 5 April 200329 | 15 March 200729 | |||
|---|---|---|---|---|---|---|---|
| Vesicle type | Type1 (w/L > 0.8) | Type2 (w/L < 0.8) | Type1 (w/L > 0.8) | Type2 (w/L < 0.8) | / | / | |
| Ref. area melt | mm2 | 7.17 | 2.09 | / | / | ||
| n | 2006 | 3741 | 715 | 1432 | / | / | |
| L (Peak size) | µm | 8 | 20 | 4 | 16 | / | / |
| L (Size range) | µm | 0.2–152 | 0.5–667 | 0.5–122 | 1–365 | / | / |
| NA bulk | mm−2 | 280 (50–500) | 521 (135–1160) | 342 (88–773) | 685 (555–1255) | / | / |
| NV bulk | mm−3 | 4069 | 5540 | 270 | 376 | ||
| Φ | area % | 13 (0–27) | 37 (24–50) | 11 (0–30) | 39 (35–43) | 58 | 57 |
Ref. Area melt stands for the sum of the area of studied LP clasts (corrected for vesicles) used for vesicles quantification; n is the number of vesicles counted in the analyzed area; Peak size is the main peak diameter in vesicle size distribution histogram; Size range is a whole range of vesicle diameters; NA bulk is the number density of vesicles per unit of area (n/Ref. Area) (minimum-maximum values in brackets); NV bulk is the number density of vesicles per unit of volume computed using CSD correction software70; Φ is the vesicles area fraction (minimum-maximum values in brackets). Available NV and Φ data from literature29 on the 2003 and 2007 paroxysms are also reported for comparison.