La Clapière landslide endogenous event catalogs
More than 50000 events have been detected in the data recorded by the La Clapière seismological antenna since its installation in November 2010.
A pseudo-automatic programme has been developed in order to detect, classify, and locate these events.
Most events are rockfalls located in the most active zones.
There are also micro-earthquakes (inside rockslide) and external earthquakes.
Catalogs noted as preliminary may slightly change, mostly for events classified N.
It is also worth noting that the first antenna (CLP) was installed in the centre of the active zone. It has therefore been recording very local rockfalls (close to one sensor), some of these rockfalls being very small. This type of events has been quite difficult to distinguish from local noise and has therefore been classified as N.
Events are classified as:
- R: rockfalls. These signals last for several tens of seconds up to several minutes and show similar amplitudes on all channels.
- Q: microearthquakes, with shorter duration varying between about 0.1 sec and 10 sec. They can be distinguished from external earthquakes by the absence of distinct P and S wave and by the smaller apparent velocity (about 2000 m/sec compared to 3000 to 4000 m/s for earthquakes located several km away from the rockslide).
- S: earthquakes, located further than a few km from the landslide. They can be recognized from local events by their larger apparent velocity and by distinct P and S waves.
- N: events not yet identified.
Below are the available catalogs:
|2010||Nov 01||Dec 31||1426||Complete, validated|
|2011||Jan 01||Dec 18||3502||Complete, validated|
|2012||Jan 01||Dec 31||9731||Complete, validated|
|2013||Jan 01||Dec 31||14171||Complete, validated|
|2014||Jan 01||Dec 31||13803||Complete, validated|
|2015||Jan 01||Dec 31||7664||Complete, validated|
|2016||Jan 01||Dec 31||7600 (to be validated)||Complete, not fully validated|
|2017||Jan 01||Jun 21||2551||Near-real time, complete, validated|
Plots obtained using the above catalogs, along with rainfall and displacement (click to enlarge):
|Last 365 days: number of endogenous seismological events per day, along with OMIV rainfall and displacement data
Note that displacement data recorded after june 2014 is not currently available.
Similar plots for past calendar years: 2011, 2012, 2013, 2014, 2015.
Recovering event data
Event data (miniseed or full SEED) can be recovered: