+It may be tiny, but to us it was large enough. At 01:50hrs UTC on 23Feb2018 a moderate to small M4.9 earthquake near Chirilagua, El Salvador. The sensitivity of the EQ1 Seismograph is continuously tracked. Unexpected, but yet the wave form was clearly detected. Very intriguing. The seismogram below was extracted from the EQ1 Seismograph.