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| Image | Details | Volcanoes | Keywords |
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| Caption: | Strong winds blowing to the north in the region north of Aniakchak and east of Port Heiden have picked up loose volcanic ash and carried it to the north today. A dense cloud of possible resuspended volcanic ash was observed near ground levels in this web camera view at Port Heiden. Satellite views confirm that this cloud has been drifting to the north approximately 200 km. |
| Date: | August 1, 2021 9:04 PM |
| Photographer: | Port Heiden FAA webcam, |
| Aniakchak | Tephra |
 |
| Caption: | Shortwave infrared Worldview-3 satellite image of the Great Sitkin crater with a new circular lava dome, imaged on July 26, 2021. |
| Date: | July 26, 2021 11:16 PM |
| Photographer: | Loewen, Matt |
| Great Sitkin | Dome |
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| Caption: | Great Sitkin crater with a new circular lava dome, imaged on July 26, 2021. Dome is about 130 m diameter. |
| Date: | July 26, 2021 10:36 PM |
| Photographer: | Loewen, Matt |
| Great Sitkin | Dome |
 |
| Caption: | Great Sitkin crater with a new circular lava dome, imaged on July 26, 2021. Dome is about 130 m diameter. |
| Date: | July 26, 2021 10:36 PM |
| Photographer: | Loewen, Matt |
| Great Sitkin | Dome |
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| Caption: | Pansharpened near-IR Worldview-3 image of Cleveland shows elevated surface temperatures (red, band 8) within cracks in the summit crater consistent with very near-surface magma. |
| Date: | July 23, 2021 10:32 PM |
| Photographer: | Loewen, Matt |
| Cleveland | Caldera/crater |
 |
| Caption: | Robust steaming from the active vent at Semisopochnoi, observed in web camera images from station CEPE, evening of July 21, 2021. |
| Date: | July 21, 2021 11:04 AM |
| Photographer: | Alaska Volcano Observatory |
| Semisopochnoi | Fumarolic activity, Steam |
 |
| Caption: | Great Sitkin steaming photographed by Simon Kline on the Cold Bay to Adak flight on July 14, 2021. |
| Date: | July 14, 2021 12:00 AM |
| Photographer: | Kline, Simon |
| Great Sitkin | Caldera/crater, Fumarolic activity, Gas, Steam, Volcano |
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| Caption: | Polished mount backscatter electron image of a breadcrust bomb erupted from Great Sitkin on May 25, 2021. Image is 8.2 x 7.4 mm across. The top of the image captures the dense rind of a bomb while the vesicular interior is exposed along the bottom. Mineral phases include plagioclase (dark gray), pyroxenes (medium gray) and magnetite (white). Void spaces and vesicles are black. Rhyolitic glass forms interstitial spaces between mineral grains and is similar color to plagioclase. Trace amounts of apatite (light gray) and an SiO2 phase (dark gray and anhedral) are also visible. Images acquired on an JEOL 6510LV SEM at 20 kV, 12 mm working distance, spot size of 65, and in BEC imaging mode. |
| Date: | July 13, 2021 12:00 AM |
| Photographer: | Loewen, Matt |
| Great Sitkin | Bomb |
 |
| Caption: | Clear Worldview-3 satellite SWIR false color image of Cleveland on July 11, 2021. |
| Date: | July 11, 2021 10:41 PM |
| Photographer: | Loewen, Matt |
| Cleveland | Caldera/crater |
 |
| Caption: | Clear Worldview-3 satellite image of Cleveland on July 11, 2021. |
| Date: | July 11, 2021 10:41 PM |
| Photographer: | Loewen, Matt |
| Cleveland | Caldera/crater, Steam |
 |
| Caption: | Veniaminof central cone with new in 2021 ice melt and lava flows behind. |
| Date: | June 29, 2021 1:26 PM |
| Photographer: | Read, Cyrus |
| Veniaminof | Caldera/crater, Glacier |
 |
| Caption: | The new (2021) lava flows in a glacial hole near the central cone of Veniaminof Volcano. |
| Date: | June 29, 2021 11:59 AM |
| Photographer: | Read, Cyrus |
| Veniaminof | Glacier, Lava flow |
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| Caption: | Mario Angarita working at site WESE on Westdahl Volcano on a grey Aleutians day |
| Date: | June 25, 2021 12:00 AM |
| Photographer: | Boyce, Ellie |
| Westdahl | Fieldwork operations |
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| Caption: | Cleveland Volcano, Chuginadak Island |
| Date: | June 18, 2021 6:05 PM |
| Photographer: | Herstand, Malcolm |
| Cleveland | |
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| Caption: | Cleveland Volcano, Chuginadak Island |
| Date: | June 18, 2021 6:05 PM |
| Photographer: | Herstand, Malcolm |
| Cleveland | |
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| Caption: | Cleveland Volcano, Chuginadak Island |
| Date: | June 18, 2021 6:05 PM |
| Photographer: | Herstand, Malcolm |
| Cleveland | |
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| Caption: | Cleveland Volcano, Chuginadak Island |
| Date: | June 18, 2021 6:05 PM |
| Photographer: | Herstand, Malcolm |
| Cleveland | |
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| Caption: | Cleveland Volcano, Chuginadak Island |
| Date: | June 18, 2021 6:05 PM |
| Photographer: | Herstand, Malcolm |
| Cleveland | |
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| Caption: | Cleveland Volcano, Chuginadak Island |
| Date: | June 18, 2021 6:05 PM |
| Photographer: | Herstand, Malcolm |
| Cleveland | |
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| Caption: | Cleveland Volcano, Chuginadak Island |
| Date: | June 18, 2021 6:04 PM |
| Photographer: | Herstand, Malcolm |
| Cleveland | |
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| Caption: | Cleveland Volcano, Chuginadak Island |
| Date: | June 18, 2021 6:03 PM |
| Photographer: | Herstand, Malcolm |
| Cleveland | |
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| Caption: | Cleveland Volcano, Chuginadak Island |
| Date: | June 18, 2021 6:02 PM |
| Photographer: | Herstand, Malcolm |
| Cleveland | |
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| Caption: | Cleveland Volcano, Chuginadak Island |
| Date: | June 18, 2021 6:01 PM |
| Photographer: | Herstand, Malcolm |
| Cleveland | |
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| Caption: | Carlisle Island and Volcano |
| Date: | June 18, 2021 5:56 PM |
| Photographer: | Herstand, Malcolm |
| Carlisle | |
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| Caption: | Yunaska Caldera |
| Date: | June 18, 2021 5:46 PM |
| Photographer: | Herstand, Malcolm |
| Yunaska | |
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