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Today's helicorder plots
The helicorders show true (instrument-corrected) ground motions and atmospheric pressure variations.
The displays are in near-realtime and will update automatically approximately every 10 minutes.
- LPd SPd SPn AKN
- LPd SPd SPn ARC
- LPd SPd SPn FIN
- LPd SPd SPn HFS
- LPd SPd SPn JMIC
- LPd SPd SPn NOA
- LPd SPd SPn NRS
- LPd SPd SPn SPI
- LPd SPd SPn TROLL
- LPd SPd SPn KBS
- LPd SPd SPn HOPEN
- LPd SPd SPn HSPB
- LPd SPd SPn BRB
- LPd SPd SPn EKA
- LPd SPd SPn ARC (infrasound)
- LPd SPd SPn NRS (infrasound)
LPd: Long-Period (dynamic scaling), SPd: Short-Period (dynamic scaling), SPn: Short-Period (noise scaling)