#!/bin/bash
# Version: VVVVV

# get starting date
# find gdate or date command ( OSX: brew install coreutils)
# the date command on OSX is not compatible to the linux date command
datecmd=$((which gdate || which date )| grep bin)
STIME="${1:-$(${datecmd} -d 6-month-ago +%Y-%m-%d)}"
STIME="${STIME:-$(date +%Y-%m-%d)}"

# get output filename
OUTPUT="${2:--}"

# fetch events
curl -s -o ${OUTPUT} "https://fdsnws.geophysik.ruhr-uni-bochum.de/fdsnws/event/1/query?starttime=${STIME}&minlat=50.0&maxlat=53.0&minlon=4.0&maxlon=10.0&minmag=0.7"