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Table 1 Annual eruption probability ‘λ (VEI 2–7)’ for each volcanic source in the Indonesian sub-region using a conversion factor of 1.75

From: Probabilistic Volcanic Ash Hazard Analysis (PVAHA) I: development of the VAPAH tool for emulating multi-scale volcanic ash fall analysis

Volcano Category N (VEI 2–3)a λ (VEI 2–3)a N (VEI 4–7)b λ (VEI 4–7)b N (VEI 2–3) normalisedc N (VEI 2–7)c λ (VEI 2–7)c
Agung Large cone 3 0.0125 1 0.00238 5.25 6.25 0.0148
Awu Large cone 13 0.0541 2 0.00476 22.75 24.75 0.0589
Batur Caldera 26 0.1083 - - 45.5 45.5 0.1083
Besar Large cone - - - - - - 0.0420a
Cereme Large cone 4 0.0166 - - 7 7 0.0166
Dieng V.C Large cone 22 0.0916 - - 38.5 38.5 0.0916
Dukono Large cone 3 0.0125 - - 5.25 5.25 0.0125
Galunggung Large cone 3 0.0125 2 0.00476 5.25 7.25 0.0172
Gamalama Large cone 57 0.2375 - - 99.75 99.75 0.2375
Gamkonora Large cone 11 0.0458 1 0.00238 19.25 20.25 0.0482
Gede Large cone 23 0.0958 - - 40.25 40.25 0.0958
Guntur Large cone 22 0.0916 - - 38.5 38.5 0.0916
Ijen Large cone 10 0.0416 - - 17.5 17.5 0.0416
Kelut Large cone 13 0.0541 6 0.01428 22.75 28.75 0.0684
Krakatau Caldera 41 0.1708 1 0.00238 71.75 72.75 0.1732
Lokon-Empung Large cone 25 0.1041 - - 43.75 43.75 0.1041
Mahawu Large cone 6 0.025 - - 10.5 10.5 0.025
Makian Large cone 6 0.025 3 0.00714 10.5 13.5 0.0321
Merapi Large cone 54 0.225 2 0.00476 94.5 96.5 0.2297
Raung Large cone 59 0.2458 4 0.00952 103.25 107.25 0.2553
Rinjani Large cone 15 0.0625 - - 26.25 26.25 0.0625
Salak Large cone 5 0.0208 - - 8.75 8.75 0.0208
Sangeang Api Large cone 16 0.0666 - - 28 28 0.0666
Semeru Large cone 59 0.2458 - - 103.25 103.25 0.245833
Serua Large cone 7 0.0291 1 0.00238 12.25 13.25 0.0315
Sinabung Large cone 1 0.0041 - - 1.75 1.75 0.0041
Suoh Caldera - - 1 0.00238 0 1 0.0023
Tambora Large cone 6 0.025 1 0.00238 10.5 11.5 0.0273
Teon Large cone 1 0.0041 1 0.00238 1.75 2.75 0.0065
Tongkoko Large cone 4 0.0166 1 0.00238 7 8 0.0190
Wurlali Large cone 1 0.0041 - - 1.75 1.75 0.0041
  1. aROC = T = 240 years, bROC = T = 420 years, cROC (normalised) = T = 420 years