Abstract
FOUR strong distant earthquakes were registered at Kew Observatory during September. They were on September 12, 19, 21, and 22. The second of these was the greatest, having a ground amplitude at Kew of 47 μ, and being estimated at a distance of 17,400 km. The second was at a distance of 6,100 km. with an estimated depth of focus of about 390 km., whilst the third, probably distant about 140°, had a depth of focus of approximately 500 km. News from other observatories is awaited before the epicentres and depths of focus can be given with precision.
Article PDF
Rights and permissions
About this article
Cite this article
Recent Earthquakes. Nature 146, 490 (1940). https://doi.org/10.1038/146490a0
Issue Date:
DOI: https://doi.org/10.1038/146490a0