University doctoral candidate Alvaro Diaz-Flores Caminero and undergraduate student Claire Pedersen were the lead authors of the paper. After the United Nations General Assembly adopted the Comprehensive Nuclear-Test-Ban Treaty in 1996, scientists set up the International Monitoring System (IMS). After the United Nations General Assembly adopted the Comprehensive Nuclear-Test-Ban Treaty in 1996, scientists set up the International Monitoring System (IMS) to check if any nuclear devices were detonated. It covers sounds below 20 Hz and down as far as 0.001 Hz. Infrasound, also known as low-frequency sound, describes sound waves with a frequency below the lower limit of human audibility.
the theoretical environment that exists for the last 3 to 4 years has finally been created with the creation of the USC base.
( z0 create :ARG1 ( z1 environment :ARG1-of ( z2 exist :time ( z3 before :duration ( z4 between :op ( z5 temporal-quantity :quant 3 :unit ( z6 year ) ) :op ( z7 temporal-quantity :quant 4 :unit ( z8 year ) ) ) :op ( z9 now ) ) ) :mod ( z10 theory ) ) :instrument ( z11 create :ARG1 ( z12 base :mod ( z13 government-organization :name ( z14 name :op "USC" ) ) ) ) :time ( z15 final ) )
(z0 / create-01
    :ARG1 (z1 / environment
              :ARG1-of (z2 / exist-01
                           :time (z3 / before
                                     :duration (z4 / between
                                                   :op1 (z5 / temporal-quantity
                                                            :quant 3
                                                            :unit (z6 / year))
                                                   :op2 (z7 / temporal-quantity
                                                            :quant 4
                                                            :unit (z8 / year)))
                                     :op1 (z9 / now)))
              :mod (z10 / theory))
    :instrument (z11 / create-01
                     :ARG1 (z12 / base
                                :mod (z13 / government-organization
                                          :name (z14 / name
                                                     :op1 "USC"))))
    :time (z15 / final))
the theoretical environment that exists for the last 3 to 4 years has finally been created with the creation of the USC base .
z1 :mod z10
z1 :ARG1-of z2
z2 :time z3
z3 :duration z4
z4 :op1 z5
z5 :quant 0
z4 :op2 z7
z7 :quant 1
z5 :unit z6
z7 :unit z8
z3 :op1 z9
z0 :time z15
z0 :ARG1 z1
z0 :instrument z11
z13 :name z14
z14 :op1 2
z12 :mod z13
z11 :ARG1 z12