NASAさんのインスタグラム写真 - (NASAInstagram)「The cold never bothered this lake anyway! ❄️ Oregon's Crater Lake hasn't frozen over in more than 70 years, despite cold temperatures and heavy snow in the surrounding national park (including a whopping 13 feet of snow on the ground as of April 4, 2023). This lake, the deepest in the United States, rarely freezes over because of its unique combination of massive water volume and small surface area. As a result, its deep blue color stands out strikingly against the white snow in this NASA/@usgslandsat image, providing a clear view of the small islands in the lake. Learn more at the link in our bio! Image Descriptions: 1: A satellite image of Crater Lake in Oregon, which appears as a deep blue, ragged oval in the center of a snowy mountain landscape. The land surrounding the lake fades from smoother, bluish land at the left of the image toward more rugged, green and white land to the right. Rivers and roads are visible as white branched lines cutting through darker areas, and dark branched lines cutting through snowy areas. White text labels Crater Lake in the center, with arrows pointing toward Wizard Island, a small blob of white near the right side of the lake, and Mount Scott, below and to the right of the lake on land. 2: A close-up satellite image of the lower right quadrant of Oregon's Crater Lake, with the deep blue of the lake covering the upper left of the image and its jagged coastline curving through the middle of the image from top center to left center. White text labels Phantom Ship, a tiny island near the coastline on the left side of the image. The land that covers the rest of the image is rugged and covered in snow, with gray-blue ground giving way to bright white snow near the coastline. Pinnacles Road, a straight white line running diagonally through the lower center image toward the lake, is labeled with white text. A snowy white peak in the upper right is labeled Mount Scott.」4月20日 3時41分