Case studies

Date:
June 2018
Perth, Australia

HVSR-aided monitoring of embankment integrity

Fortescue Metals has recently studied the applicability of the HVSR method to the assessment of mining embankment integrity.

Embankments are common features in mine sites, necessary for tailings storage, surface water management or general infrastructure such as dewatering ponds. Even though their construction methodology can largely vary, the degree of compaction is a fundamental property to be assessed during the construction and to be monitored over time.

The geometry of embankments is usually very well known, thanks to high precision topographic surveys: this allows to use the HVSR method to estimate the average shear wave velocities of different embankment parts, as shown in this report. The shear wave velocities can in turn be linked to the levees’ degree of compaction and to discriminate stable embankments from altering ones over time.

 

Date:
May 2017
Western Australia

Passive seismic identifies a meteorite crater in Western Australia

An intriguing presentation given by dr. Jayson Meyers (Resource Potential, Perth, Australia) that illustrates how passive seismic and other geophysical methods identify a young meteorite crater in Archaean greenstone of the Coolgardie Goldfield (Western Australia).

Date:
April 2017
Bardon Quarry (UK)

Passive seismic surveying for the quarrying industry

Good quarry design depends upon a ground model that reliably defines the quality, volume and spatial distribution of resource and waste. Most ground models are based on boreholes, sometimes with additional 2D or 3D control provided by ‘traditional’ geophysical surveys such as microgravity, resistivity and active seismic. However, for logistical and economic reasons, these may not always be practical options for site investigations.
A new article published by some authors from the British Geological Survey showcases ‘passive’ seismic survey as a rapid alternative means of imaging the subsurface.

Date:
December 2016

Study of the Kathmandu valley seismic response during the 2015 M7.6 Nepal earthquake

A study of the site amplification in the Kathmandu valley  during the 2015 M7.6 Gorkha, Nepal earthquake, has recently been published in the Bulletin of Earthquake Engineering (2016, vol. 14, p. 3301-3315) by Sarah Tallett-Williams  et al. The study was performed by using as a main tool a Tromino®  donated to the mission by MoHo srl.  

Date:
November 2016

The complementarity of H/V and dispersion curves

A new paper has been published on the complementarity of the H/V and dispersion curves, with practical insights (Geophysics,  Nov. 2016). Write us (support@moho.world) for further information.

Date:
July 2016
Paris

Dynamic characterization of the Eiffel Tower

The Eiffel tower is the most visited monument in the world. Millions of visitors have taken millions of pictures of it over the last century but apparently a dynamic picture was not publicly available. In this paper the authors show the amount of information that can be extracted from a few recordings with TROMINO® on the tower, during a visit of pleasure.  The original and complete version of this work (in English), which includes the dynamic characterization of the subsurface and other dynamic analysis (earthquakes, wind) of the tower, can be requested directly to the authors.