Added nsigma argument [skip CI]
Added nsigma argument [skip CI]


Former-commit-id: c00f935f9d7395610fd0a025cb7844fb98b76e62 [formerly c00f935f9d7395610fd0a025cb7844fb98b76e62 [formerly 445f12c990f4bf0dcb7e988a8ec1c1b168ddc15b]]
Former-commit-id: 7fcf36286cf61ae2944fff5f0b79d6fc31bf8fc0
Former-commit-id: a7bb087dcf355f3c97d9501523d067368e4d47fe
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine