Photo: Extreme Ocean Storms On the Rise, Tremors Show



Four tropical storms spin across the western Atlantic Ocean in an image taken September 23, 2004.

Earth's seas have become much stormier over the past three decades, according to new analyses of faint tremors caused by ocean waves.

Image courtesy NOAA


NEWS FEEDS    After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed. After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed.

Get our news delivered directly to your desktop—free.
How to Use XML or RSS

ADVERTISEMENT

NATIONAL GEOGRAPHIC'S PHOTO OF THE DAY

50 Drives of a Lifetime

Listen to your favorite National Geographic news daily, anytime, anywhere from your mobile phone. No wires or syncing. Download Stitcher free today.