Vertical components: 200906


Noise Levels at Different Periods

The table below gives the decibel 10% noise level (in db) for each month in several period bands. The 10% noise level is defined as the signal level not exceeded 10% of the time, based on hourly measurements. Each entry in the table is color coded with reference to the New Low Noise Model (NLNM, Peterson, 1993):
navy, -6 db < value-NLNM < -3 db
blue, -3 db < value-NLNM < 3 db
aqua, 3 db < value-NLNM < 6 db
lime, 6 db < value-NLNM < 9 db
yellow, 9 db < value-NLNM < 12 db
orange, 12 db < value-NLNM < 15 db
red, 15 db < value-NLNM < 20 db
fuchsia, 20 db < value-NLNM < 25 db
silver, value-NLNM < -6 db, value-NLNM > 25 db

Black indicates that there was an insufficient number of hourly measurements to calculate a noise level.


Noise levels (PSD) in decibels
Stat. Chan. Qual. # obs. 268s 228s 193s 164s 139s 118s 100s 85s 72s 61s 52s 44s 37s 32s 27s 23s 19s 16s 14s 12s 10s 8s 7s 6s 5s 4s
KBS-IU LHZ-00 AR 2880 -184 -184 -184 -184 -184 -184 -184 -185 -186 -187 -187 -186 -185 -184 -180 -177 -169 -163 -163 -164 -162 -155 -147 -144 -140 -137
KBS-IU LHZ-10 AR 2880 -180 -182 -182 -183 -183 -183 -184 -185 -186 -186 -186 -186 -185 -184 -180 -176 -169 -163 -163 -164 -162 -155 -147 -143 -140 -137
ALE-II LHZ-00 AR 2880 -186 -185 -185 -184 -184 -184 -184 -185 -187 -187 -187 -186 -185 -184 -180 -176 -168 -161 -162 -165 -161 -153 -146 -143 -139 -137
ALE-II LHZ-10 AR 2880 -177 -179 -180 -181 -182 -183 -183 -184 -185 -186 -186 -186 -185 -183 -180 -175 -168 -161 -162 -165 -161 -153 -146 -143 -139 -137
SFJD-IU LHZ-00 AR 2880 -183 -183 -183 -183 -183 -184 -184 -185 -186 -186 -186 -186 -185 -183 -179 -175 -167 -161 -162 -164 -160 -153 -147 -144 -139 -135
SPB4-NO BHZ-00 AR 2871 -162 -165 -168 -172 -174 -177 -179 -180 -182 -183 -183 -183 -183 -182 -180 -176 -168 -163 -163 -164 -162 -154 -147 -143 -139 -135
JMIC-NO BHZ-00 AR 2802 -179 -180 -181 -181 -182 -182 -183 -184 -185 -185 -185 -185 -184 -183 -180 -177 -170 -164 -163 -164 -161 -153 -145 -142 -136 -132
SPB3-NO BHZ-00 AR 2871 -162 -165 -168 -171 -174 -176 -178 -180 -181 -182 -182 -183 -182 -182 -179 -176 -168 -163 -163 -164 -162 -154 -147 -143 -139 -135
SPA0-NO BHZ-00 AR 2871 -160 -163 -167 -170 -173 -175 -177 -179 -180 -181 -181 -182 -181 -180 -179 -175 -168 -163 -163 -164 -162 -154 -147 -144 -139 -135
SPB5-NO BHZ-00 AR 2871 -160 -164 -167 -170 -173 -175 -177 -179 -179 -180 -181 -181 -181 -180 -179 -175 -168 -163 -163 -164 -162 -154 -147 -144 -139 -135
SUMG-GE LHZ AR 2880 -183 -183 -183 -183 -183 -183 -184 -185 -185 -185 -185 -184 -182 -181 -178 -175 -167 -162 -163 -164 -161 -152 -145 -140 -135 -130
SPB1-NO BHZ-00 AR 2871 -159 -163 -165 -168 -171 -173 -174 -176 -177 -178 -178 -179 -179 -178 -177 -174 -168 -163 -163 -164 -162 -154 -147 -144 -139 -135
BORG-II LHZ-10 AR 2878 -159 -162 -164 -167 -170 -173 -175 -178 -180 -181 -182 -182 -182 -181 -179 -176 -169 -163 -163 -164 -156 -152 -145 -141 -135 -131
SPB2-NO BHZ-00 AR 2871 -158 -161 -164 -167 -170 -173 -174 -176 -177 -178 -179 -179 -179 -179 -178 -174 -168 -162 -163 -164 -162 -154 -146 -143 -139 -134
BORG-II LHZ-00 AR 2878 -172 -173 -173 -173 -174 -174 -174 -175 -175 -176 -177 -177 -177 -177 -177 -175 -169 -163 -163 -164 -160 -153 -145 -141 -135 -132
DAG-GE LHZ AR 2878 -160 -161 -164 -165 -167 -169 -171 -172 -173 -175 -175 -176 -176 -176 -175 -172 -167 -162 -163 -164 -162 -154 -146 -143 -140 -137
FRB-CN BHZ AR 2877 -175 -176 -176 -177 -177 -177 -177 -178 -179 -179 -180 -181 -180 -180 -178 -174 -166 -160 -160 -163 -157 -149 -144 -143 -137 -134
SFJD-IU LHZ-10 AR 2880 -159 -161 -163 -165 -167 -169 -171 -172 -174 -176 -177 -178 -178 -178 -177 -174 -166 -161 -162 -164 -160 -153 -147 -144 -139 -135
RES-CN BHZ AR 2634 -165 -165 -166 -168 -169 -169 -170 -171 -172 -173 -174 -174 -175 -175 -175 -173 -166 -160 -161 -164 -157 -147 -143 -142 -138 -135
EUNU-CN BHZ AR 2850 -152 -154 -156 -157 -159 -160 -161 -163 -164 -165 -166 -167 -167 -168 -168 -168 -163 -158 -160 -163 -159 -149 -143 -141 -138 -134