div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=refraction-of-microseismshtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Refraction of Microseisms loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentssitereader031viewer20220205225750680d1a28ab0f07ae60cehtml5thumbnails1jpg width=140 height=200 divp© 1958 Nature Publishing Grouppdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imageimg data-url=refraction-of-microseismshtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: Refraction of Microseisms loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentssitereader031viewer20220205225750680d1a28ab0f07ae60cehtml5thumbnails2jpg width=140 height=200 divp© 1958 Nature Publishing Grouppdiv