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| Image | Details | Volcanoes | Keywords |
 |
| Caption: | Vertical-component seismic waveforms and spectrograms from AVO station ILSW for the May 2016, June 2019, and June 2023 avalanches on Iliamna Volcano. Waveforms are high-pass filtered at 100 s. All axis limits are identical. Modified from Figure 4 in Toney et al. (2021).
Toney, L., Fee, D., Allstadt, K. E., Haney, M. M., & Matoza, R. S. (2021). Reconstructing the dynamics of the highly similar May 2016 and June 2019 Iliamna Volcano (Alaska) ice–rock avalanches from seismoacoustic data. Earth Surface Dynamics, 9(2), 271–293. https://doi.org/10.5194/esurf-9-271-2021 |
| Date: | June 5, 2023 12:00 AM |
| Photographer: | Toney, Liam |
| Iliamna | Avalanche |
 |
| Caption: | Cleveland summit with Carlisle beyond, photo taken May 31, 2023. Courtesy of Dane Ketner, USGS. |
| Date: | May 31, 2023 7:54 PM |
| Photographer: | Ketner, Dane |
| Carlisle, Cleveland | Caldera/crater, Fieldwork operations, Fumarolic activity, Stratovolcano |
 |
| Caption: | Photograph of Great Sitkin Volcano, showing lava flows that have been forming during the eruption that started in May 2021. Recent lava effusion has formed the relatively snow-free lava lobes covering the right (eastern) side of the summit crater. Photo by Dave Clum, Alaska Airlines pilot, May 20, 2023. |
| Date: | May 20, 2023 12:00 AM |
| Photographer: | Clum, Dave |
| Great Sitkin | Lava flow |
 |
| Caption: | Photograph of Great Sitkin Volcano, showing lava flows that have been forming during the eruption that started in May 2021. Recent lava effusion has formed the relatively snow-free lava lobes covering the right (eastern) side of the summit crater. Photo by Dave Clum, Alaska Airlines pilot, May 20, 2023. |
| Date: | May 20, 2023 12:00 AM |
| Photographer: | Clum, Dave |
| Great Sitkin | Lava flow |
 |
| Caption: | False color short-wave infrared (SWIR, pansharpened) satellite image of Great Sitkin showing the ongoing lava flow within the summit crater. Warm areas near the vent and in places near the flow margin are red. Black, snow-free areas on the east side of the flow indicate areas of recent flow growth. In this image snow is blue and clouds and steam emissions are white. |
| Date: | May 19, 2023 10:52 PM |
| Photographer: | Loewen, Matt |
| Array | Lava flow |
 |
| Caption: | The Natural History Seminar Series presents "An Update on Mount Edgecumbe from the Alaska Volcano Observatory" Keep informed about the low-level unrest occurring at Mount Edgecumbe and learn about plans by the Alaska Volcano Observatory to study and monitor the volcano. Audience questions encouraged!
May 8th at 7 pm, UAS Sitka campus room 229. |
| Date: | May 8, 2023 12:00 AM |
| Photographer: | Labounty, Kitty |
| Edgecumbe | Volcano |
 |
| Caption: | Join us for an Interpretive Walk with scientists from the Alaska Volcano Observatory
Sunday, May 7, 2023
10:30 am - 12:30 pm
Meet at Kimsham Ballfield Cross Trail entrance.
Short walk to tephra (ash) demonstration and talk, then observe volcanic deposits along the Cross Trail. |
| Date: | May 7, 2023 12:00 AM |
| Photographer: | Schmidt, Jacyn |
| Edgecumbe | Volcano |
 |
| Caption: | Geologists from the Alaska Volcano Observatory will deliver a concise presentation regarding the ongoing volcanic unrest at L’úx Shaa / Mt. Edgecumbe. This informative session aims to provide valuable insights to the community members and encourage an exchange of ideas and questions between them and the AVO staff during a friendly meet and greet. Saturday May 6, 6 - 8 pm, Sheet'ka Kwaan Naa Kahidi House. |
| Date: | May 6, 2023 12:00 AM |
| Photographer: | Miller, Travis |
| Edgecumbe | Volcano |
 |
| Caption: | Coloring page made for outreach in Sitka. The outline is of Mt. Edgecumbe as viewed from the community of Sitka. |
| Date: | May 5, 2023 12:00 AM |
| Photographer: | Rosenkrans, Hannah |
| Edgecumbe | Just for fun, Volcano |
 |
| Caption: | Photomicrograph of clear to brown, bubble-bearing melt inclusions (up to ~110 x 110 µm) in pyroxene from Mount Edgecumbe rhyolite sample 82ARj136. Also note two embayments (one narrow and one wide) protruding into the crystal along the lower edge. Crystal picked from 250-500 µm size fraction of crushed lapilli-sized pumices. |
| Date: | May2023 12:00 AM |
| Photographer: | Hosseini, Behnaz |
| Edgecumbe | Tephra |
 |
| Caption: | Photomicrograph of crystallized melt inclusion assemblage in plagioclase from Mount Edgecumbe scoria sample 81ARj73A. Crystal picked from 250-500 µm size fraction. |
| Date: | May2023 12:00 AM |
| Photographer: | Hosseini, Behnaz |
| Edgecumbe | Tephra |
 |
| Caption: | Photomicrograph of crystallized melt inclusion (~53 x 53 µm) from Mount Edgecumbe scoria sample 81ARj73A. Crystal picked from 250-500 µm size fraction. |
| Date: | May2023 12:00 AM |
| Photographer: | Hosseini, Behnaz |
| Edgecumbe | Tephra |
 |
| Caption: | Backscatter electron polished mount image of an Edgecumbe dacite pumice (sample 81ARJ75A). Image acquired on an JEOL 6510LV SEM at 20 kV, 12 mm working distance, spot size of 65, and in BEC imaging mode. |
| Date: | May2023 12:00 AM |
| Photographer: | Loewen, Matt |
| Edgecumbe | Tephra |
 |
| Caption: | Photomicrograph of faceted, bubble-bearing melt inclusion (~65 x 53 µm) in pyroxene from Mount Edgecumbe rhyolite sample 82ARj136. Crystal picked from 250-500 µm size fraction of crushed lapilli-sized pumices. |
| Date: | May2023 12:00 AM |
| Photographer: | Hosseini, Behnaz |
| Edgecumbe | Tephra |
 |
| Caption: | Backscatter electron polished mount image of an Edgecumbe basalt scoria clast (sample 81ARJ073A). A rare ~1 mm-long plagioclase phenocryst is visible in this image. Image acquired on an JEOL 6510LV SEM at 20 kV, 12 mm working distance, spot size of 65, and in BEC imaging mode. |
| Date: | May2023 12:00 AM |
| Photographer: | Loewen, Matt |
| Edgecumbe | Tephra |
 |
| Caption: | Backscatter electron polished mount image of an Edgecumbe dacite pumice (sample 81ARJ75A). Image acquired on an JEOL 6510LV SEM at 20 kV, 12 mm working distance, spot size of 65, and in BEC imaging mode. |
| Date: | May2023 12:00 AM |
| Photographer: | Loewen, Matt |
| Edgecumbe | Tephra |
 |
| Caption: | Backscatter electron polished mount image of an Edgecumbe basalt scoria clast (sample 81ARJ073A). Image includes a rare larger olivine phenocryst. Image acquired on an JEOL 6510LV SEM at 20 kV, 12 mm working distance, spot size of 65, and in BEC imaging mode. |
| Date: | May2023 12:00 AM |
| Photographer: | Loewen, Matt |
| Edgecumbe | Tephra |
 |
| Caption: | Backscatter electron polished mount image of an Edgecumbe rhyolite pumice (sample 82ARJ136). Image acquired on an JEOL 6510LV SEM at 20 kV, 12 mm working distance, spot size of 65, and in BEC imaging mode. |
| Date: | May2023 12:00 AM |
| Photographer: | Loewen, Matt |
| Chagulak, Edgecumbe | Tephra |
 |
| Caption: | Backscatter electron polished mount image of an Edgecumbe rhyolite pumice (sample 82ARJ136). Image acquired on an JEOL 6510LV SEM at 20 kV, 12 mm working distance, spot size of 65, and in BEC imaging mode. |
| Date: | May2023 12:00 AM |
| Photographer: | Loewen, Matt |
| Chagulak, Edgecumbe | Tephra |
 |
| Caption: | Backscatter electron polished mount image of an Edgecumbe dacite pumice (sample 81ARJ75A). Three small minerals (white = ilmenite, very light gray = apatite, medium gray = pyroxene) are visible in a glassy and highly vesicular matrix. Image acquired on an JEOL 6510LV SEM at 20 kV, 12 mm working distance, spot size of 65, and in BEC imaging mode. |
| Date: | May2023 12:00 AM |
| Photographer: | Loewen, Matt |
| Edgecumbe | Tephra |
 |
| Caption: | Backscatter electron polished mount image of an Edgecumbe basalt scoria clast (sample 81ARJ073A). Image shows a typical crystalline and vesicular (black areas) groundmass. Light gray crystals are olivine and dark gray crystals are plagioclase. Image acquired on an JEOL 6510LV SEM at 20 kV, 12 mm working distance, spot size of 65, and in BEC imaging mode. |
| Date: | May2023 12:00 AM |
| Photographer: | Loewen, Matt |
| Edgecumbe | Tephra |
 |
| Caption: | Photomicrograph of melt inclusion (~94 x 53 µm) with multiple vapor bubbles from Mount Edgecumbe rhyolite sample 82ARj136. Note that the bubbles are scattered throughout the melt inclusion. This is a commonly observed melt inclusion texture in these samples. Crystal picked from 250-500 µm size fraction of crushed lapilli-sized pumices. |
| Date: | May2023 12:00 AM |
| Photographer: | Hosseini, Behnaz |
| Edgecumbe | Tephra |
 |
| Caption: | Backscatter electron polished mount image of an Edgecumbe rhyolite pumice (sample 82ARJ136). Image acquired on an JEOL 6510LV SEM at 20 kV, 12 mm working distance, spot size of 65, and in BEC imaging mode. |
| Date: | May2023 12:00 AM |
| Photographer: | Loewen, Matt |
| Chagulak, Edgecumbe | Tephra |
 |
| Caption: | Backscatter electron polished mount image of an Edgecumbe rhyolite pumice (sample 82ARJ136). Image acquired on an JEOL 6510LV SEM at 20 kV, 12 mm working distance, spot size of 65, and in BEC imaging mode. |
| Date: | May2023 12:00 AM |
| Photographer: | Loewen, Matt |
| Chagulak, Edgecumbe | Tephra |
 |
| Caption: | Backscatter electron polished mount image of an Edgecumbe basalt scoria clast (sample 81ARJ073A). This image is of an the 'orange' component of this tephra sample. The glass has been entirely altered leaving a porous matrix of crystals and no original glass. Image acquired on an JEOL 6510LV SEM at 20 kV, 12 mm working distance, spot size of 65, and in BEC imaging mode. |
| Date: | May2023 12:00 AM |
| Photographer: | Loewen, Matt |
| Edgecumbe | Tephra |
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