SEISMOGRAPH NOTES SEVERE MICROSEISMIC DISTURBANCE

One of the severest storms in the history of the Harvard seismograph station occurred last, Wednesday, it was announced yesterday by L. D. Leet, seismologist in charge. It started early in the morning and continued through the night. These rythmatic earth-vibrations have puzzled seismologists for many years. In the last storm the earth's crust in this vicinity was agitated by ripples causing vibrations as great as one thousandth of an inch, or five times as great as those recorded in a similar storm last December.