MEJ2
The creepmeter MEJ2 is installed across the well-localized Mejillones fault. The instrument crosses a surface rupture offsetting alluvial fan sediments deposited well after 26 ky by up to 30 cm. This surface rupture is the exact prolongation of a well defined fault scarp that experienced several normal faulting events recorded in slope breaks. The multiple fault slip history during the past 40 ky is also confirmed by paleoseismological investigations. The free face of the fault at this location strikes 174° and dips 86° E.
Specifications
| Location | -23.116331° S / -70.495498° W |
| Elevation | 139 m |
| Installation Date | 2008/11/26 |
| Azimuth | 84° |
| Dip | 0° |
| Length | 3 m |
| Depth | 40 - 60 cm |
| Sampling Rate | 60 sec, 30 sec since June 2010 |
| Modifications | 2009/03/23 storage box underground, solar panel firmly attached 2009/11/14 weather station installed 2010/06/07 logger power supply connected to battery, 1 V reference signal, adjustment internal clock, increased sampling rate to 30 sec 2011/03/24 logger firmware update, router firmware update, adjustment internal clock, differential voltage measurement, LVDT power supply connected directly to battery 2011/04/19 logger exchange, installation of temperature reference sensor (Pt100), installation box temperature sensor, setup online connection via WIFI bridge 2011/11/05 logger firmware update, installation satellite modem 2012/03/10 adjustment satellite modem |
| Additional Instruments | Weather station (humidity, air pressure, air temperature) |