ULN: Ulaanbaatar, Mongolia (seismic)
This near-real-time audio stream originates from a seismometer at Ulaanbaatar, Mongolia (IRIS/USGS station ULN). The low-frequency sounds of the solid Earth have been sped up by a factor of 900× to make them audible. As a result, frequencies have been transposed upward about 10 octaves. Each successive audio program (separated by a brief pause) compresses the last 168 hours into about 11 minutes (exactly 11:12) of listening time.
Spectrogram loading...
Annotated events during this period:
Technical details:
| Status : | (Operating normally) |
| Manual flags : | (none) |
| Station : | ULN (net: IRIS/USGS) at Ulaanbaatar, Mongolia |
| Sensor : | STS-1V/VBB |
| Recorder : | Quanterra QX80 @ 20 Hz |
| Pod : | ms-nut@x.x.73.182 | macOS 10.14.5 | esound v. 160 |
| Last heard from pod : | Sat Mar 25 11:00:56 UTC 2023 (about 10 minutes ago) |
| Speedup : | ×900 |
| Loop duration (real) : | 168 hours |
| Loop duration (audio) : | 11:12 (stereo) |
| Data channels : | miniseed (IU.ULN.00.BH1 IU.ULN.00.BH2) |
| Spectrogram type : | post-processed data |
| Gain correction : | 25 dB |
| SoX post-processing : | highpass -2 90 highpass -2 90 compand 0.001,0.01 6:-80,-50,-40,-10,0,-3 |
| Archives : | 2023 | 2022 | 2021 | 2020 | 2019 |
| SHOUTcast : | http://174.138.63.51:8040/;stream (es21@8040) |
| Latest factoids : | uln.7.factoids.txt |
