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Volcanic Gas

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• April 26: Diamond Head crater and Waikiki are seen shrouded in a blanket of volcanic fog covering parts of Oahu in Honolulu. Volcanic fog, or vog, forms when sulfur dioxide gas reacts with sunlight, oxygen, dust particles and water in the air.
• April 26: Diamond Head crater and Waikiki high rises are barely visible due to high levels of volcanic fog shrouding Oahu.
• April 30: Tony, left, and Sam Bayaoa examine damage to their protea plants in Ocean View on Hawaii's Big Island. For eight years, the Bayaoas have grown thousands of bright red, yellow and pink protea flowers on their two-acre farm. Then last month, Kilauea volcano 35 miles to the east opened a new vent and began spewing double the sulfur dioxide. Now about 70 percent of their crop is dried, brown, and brittle.
• April 30: Richard March sprays roses to prevent fungal infection from vog burn damage at the McCall Flower Farm in Wood Valley near Pahala, on the Big Island of Hawaii.
• April 30: Bob Armstrong strains for a vog-diminished view of the coast while inspecting damage to his protea flower crop in Ocean View on the Big Island of Hawaii.
• April 30: A visitor to Volcanoes National Park on the Big Island of Hawaii photographs an ash-laden fume cloud.
• April 30: A vog-damaged hybrid pincushion protea flower, foreground, is seen with a healthy flower, rear, on Dan Wegner's flower farm in Ocean View on the Big Island of Hawaii

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