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HOMEROS demo — daily earthquake detection workflow
Central Ionian Islands and western Greece · one full day of continuous data per iteration
PROCESSING STAGE
WRITTEN TO DISK
1 · Station metadata
FDSN request to NOA / EIDA, wildcard channels expanded
into exact E/N/Z triplets · ObsPy
metadata/stations.xml
response-level inventory, cached
2 · Daily waveform download
One folder per day, one 86 400 s MiniSEED file per component.
Merge, resample to 100 Hz, detrend, remove instrument
response to velocity · threaded, resumable
waveforms_daily/YYYYMMDD/
NET.STA.CHA
plus a per-day JSON download manifest
3 · Phase picking — PhaseNet
SeisBench, INSTANCE pre-trained weights. P/S probability
traces thresholded into discrete picks · GPU if available
all_picks.csv
trace id, phase, peak time, peak probability
4 · Association — PyOcto
4D space–time partitioning over the search volume with a
homogeneous velocity model · picks grouped into events
all_assignments.csv
origin time, lat, lon, depth and pick-to-event links
5 · Local magnitude
Wood–Anderson simulation on the horizontals, amplitude in a
3 s window after S · station ML median per event
all_events_with_magnitude.csv
the merged catalogue, one row per event
6 · Figures and export
Epicentre map, picks per station, hypoDD phase file
detected_events_map.png
phases_hypodd.dat
repeated for every day folder