High-resolution earthquake catalog obtained through template-matching in the Southern Apennine (Italy)

This is an enhanced, high-resolution earthquake catalog obtained through template-matching (TM). It covers the area of the Southern Apennines (Italy), for the period 2009-2014

Starting from about 4000 events used as templates, TM allowed to detect the hidden, small-magnitude seismicity in the 0-1 magnitude range, allowing a significant decrease of the magnitude of completeness in the resulting earthquake catalog.

The catalog contains:

templates (events catalogued by INGV and used as templates)

template-matching detections (i.e. newly detected events by TM)

events catalogued by INGV that are also found through template-matching

All events are located with the same 1-D velocity model obtained by averaging several models that have been proposed in the literature, covering different portion of the Southern Apennines. 

DATA STRUCTURE

id: id of event. Events detected by template-matching start with 'TM', otherwise the id is the same as in the official INGV catalog.

lon: longitude (degrees)

lat: latitude (degrees)

depth: depth in km

time: origin time

M_l: local magnitude

lon_error: error on longitude (degrees)

lat_error: error on latitude (degrees)

depth_error: error on depth (km)

RMS: root-mean-square (sec)

az_gap: azimuthal gap

n_phases: total number of P and S arrivals 

n_stations: total number of station recording the event

mag_diff: difference in magnitude between detection and its template

dt: difference in origin time between template and detected event (sec)

templ_id: id of the template event

as_template: =1 if the event was used as template, 0 otherwise

matched_TM (for events already catalogued by INGV): =1 if the events matched a detection made by template matching, =0 otherwise

matched_BSI: ==id of the corresponding event catalogued by INGV. For newly detected events (thus never catalogued before) this field is 'NA'