L Braile, 10/7/2006, revised 8/16/2007, 9/18/09 Earthquake Catalog/Station Log

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Presentation transcript:

L Braile, 10/7/2006, revised 8/16/2007, 9/18/09 Earthquake Catalog/Station Log

IRIS Seismic Monitor for ~12:00 August 16, 2007 (UTC)

WLIN AS-1 Seismograph 24-hour screen display for August 15-16, 2007

USGS earthquake data (

WLIN AS-1 Seismograph 24-hour screen display for September 12-13, 2007, M8.4, M7.9, M7.0, Indonesia

None Minimum “Complete” Earthquake Catalog/Station Log Options… Advantages… Good science practice Record of station information Archive of event data

Earthquake Catalog/Station Log Information… Station Log… Earthquake Catalog… Record “state of health” information for your seismograph Note dates and times of calibrations, change of location, new software, time synchronization, noise characteristics, earthquakes recorded Record earthquake information for all (well recorded) seismograms – event origin time, location, magnitude, epicenter-to-station distance, etc.

Examples… Station log… (hand written notes) Date and Time (GMT) Comment /1 16:25 AS-1 set up and operating, clock synch /4 ~10:14 EQ from Japan /16 ~04:45 EQ M6.5 Gulf of CA /18 20:52 Calibration pulse recorded /20 12:25 Install new version of AmaSeis /22 09:03 EQ M7.2 Sumatra (good surf. waves) /28 20:33 Restart computer, clock synch /20 ~07:42 EQ Rat Islands, Aleutians /27 10:51 Turn off AS-1 and computer for summer

Earthquake Catalog (Excel File)… Revised to YYMMDD Format

Suggestions… Record at least minimum information, hand written Focus on well-recorded events (don’t worry about every “wiggle” or weak, distant EQs – unless you just want to see where it came from) Synchronize clock every few days or use Internet time synch. Get an “Atomic Clock”, set to GMT time Create a seismogram archive for your station Send you best seismograms to SpiNet and download some seismograms for comparison