Sensor locations
| Location Code | BT |
|---|---|
| Opening Date | 07-03-2022 |
| End Date | - |
| Housing Class | Borehole |
| Housing Description | casing: metal; casing length: 1205 m; diameter: 24.4cm; locking mechanism: Hole lock; Casing completely filled with water, sealed on top with well head. |
| sensor depth below station | 940.0 m |
| Distance to Building (m) | - |
| Location Code | SF |
|---|---|
| Opening Date | 07-03-2022 |
| End Date | - |
| Housing Class | Freefield |
| Housing Description | concrete vault; Sensor placed directly on concrete foundation |
| sensor depth below station | 0.5 m |
| Distance to Building (m) | - |
Current Instrumentation
| Location code | BT |
|---|---|
| On date | 06-02-2024 00:00:00 |
| Off date | - |
| Sensor model | ABBT |
| Sensor manufacturer | ASIR |
| Digitizer model | Centaur |
| Digitizer manufacturer | Nanometrics |
| Channels | HG1 , HG2 , HGZ |
| Stream Noise (last week) | HG1 , HG2 , HGZ |
| Location code | SF |
|---|---|
| On date | 07-03-2022 07:37:00 |
| Off date | - |
| Sensor model | EpiSensor ES-T |
| Sensor manufacturer | Kinemetrics |
| Digitizer model | Centaur |
| Digitizer manufacturer | Nanometrics |
| Channels | HGE , HGN , HGZ |
| Stream Noise (last week) | HGE , HGN , HGZ |
Site Characterization
|
channel group |
Empirical Amplification |
|---|---|
| CH.BULAC.BT.HG |  |
| CH.BULAC.SF.HG |  |
Obtained from spectral modeling of small earthquakes with constant update.
- Top: Fourier amplification with elastic (dashed line) and anelastic (solid line) amplification functions;
- Centre: 5% damped response spectra amplification (anelastic);
- Bottom: Number of recordings used.
See Edwards et al. (2013), Determination of Site Amplification from Regional Seismicity: Application to the Swiss National Seismic Networks. Seismological Research Letters, 84(4), 611–621.
| measurements nearby | list... |
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