Credit: USGS/Cascades Volcano Observatory

Page 1 <img data-url='document/credit-usgscascades-volcano-observatory.html?page=1' data-page='1' class='cut-thumb lazyload' alt='Page 1: Credit: USGS/Cascades Volcano Observatory' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader043.cupdf.com/reader043/viewer/2022032801/623daa52c2f1073f4d118ad5/html5/thumbnails/1.jpg' width='140' height='200' /> Credit: USGS/Cascades Volcano Observatory

Page 2 <img data-url='document/credit-usgscascades-volcano-observatory.html?page=2' data-page='2' class='cut-thumb lazyload' alt='Page 2: Credit: USGS/Cascades Volcano Observatory' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader043.cupdf.com/reader043/viewer/2022032801/623daa52c2f1073f4d118ad5/html5/thumbnails/2.jpg' width='140' height='200' /> Lascar Volcano, Northern Chile

Photo: Courtesy Durham University, Earth Sciences Department

Page 3 <img data-url='document/credit-usgscascades-volcano-observatory.html?page=3' data-page='3' class='cut-thumb lazyload' alt='Page 3: Credit: USGS/Cascades Volcano Observatory' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader043.cupdf.com/reader043/viewer/2022032801/623daa52c2f1073f4d118ad5/html5/thumbnails/3.jpg' width='140' height='200' /> The

Volcanic

Explosivity

Index (VEI):

Plinian Eruptions:

Rated:

VEI 5 Or Greater

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Photo: Paricutin Volcano; Courtesy K. Segerstrom

=> Laki (Iceland) June 1783-Feb. 1784

=> Mount Tambora: April 5-11, 1815

=> Krakatau/Krakatoa: Aug. 26-27, 1883

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USGS/Cascades Volcano Observatory' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader043.cupdf.com/reader043/viewer/2022032801/623daa52c2f1073f4d118ad5/html5/thumbnails/11.jpg' width='140' height='200' /> Page 12 <img data-url='document/credit-usgscascades-volcano-observatory.html?page=12' data-page='12' class='cut-thumb lazyload' alt='Page 12: Credit: USGS/Cascades Volcano Observatory' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader043.cupdf.com/reader043/viewer/2022032801/623daa52c2f1073f4d118ad5/html5/thumbnails/12.jpg' width='140' height='200' /> Page 13 <img data-url='document/credit-usgscascades-volcano-observatory.html?page=13' data-page='13' class='cut-thumb lazyload' alt='Page 13: Credit: USGS/Cascades Volcano Observatory' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader043.cupdf.com/reader043/viewer/2022032801/623daa52c2f1073f4d118ad5/html5/thumbnails/13.jpg' width='140' height='200' /> Page 14 <img data-url='document/credit-usgscascades-volcano-observatory.html?page=14' data-page='14' class='cut-thumb lazyload' alt='Page 14: Credit: USGS/Cascades Volcano Observatory' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader043.cupdf.com/reader043/viewer/2022032801/623daa52c2f1073f4d118ad5/html5/thumbnails/14.jpg' width='140' height='200' /> Page 15 <img data-url='document/credit-usgscascades-volcano-observatory.html?page=15' data-page='15' class='cut-thumb lazyload' alt='Page 15: Credit: USGS/Cascades Volcano Observatory' loading='lazy' 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Credit: USGS/Cascades Volcano Observatory

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