Added humidity_amplification_factor [skip CI]
Added humidity_amplification_factor [skip CI]


Former-commit-id: 46e7a6ff03affc5007939b105c65f0b85e110dbf [formerly dded7a5d09ed8c11f32b57a55a5494c3699bb433]
Former-commit-id: 97016aa3e520cc8e9f0310d26e8f79ca3e913cd0
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine