Body wave magnitudes and locations of French underground explosions at the Mururoa test site

Since 1975 the French have conducted underground nuclear weapon tests beneath the Mururoa atoll in the Tuamotu Archipelago in the Southern Pacific. A least squares joint estimate of origin time and epicenter together with a least squares joint estimate of magnitude is presented from bulletins of the International Seismological Center. Some seismogram, recorded in Canada, are included to illustrate the nature of the P waves from these presumed explosions.