Volcanos

Roundup of Global Volcanic Activity:

Ketoi (Kurile Islands, Russia): SVERT raised the alert level to yellow after a weak thermal anomaly has been detected on satellite data at the summit of the volcano. No other details about possible activity are currently known.

White Island (New Zealand): Following increased tremor including numerous earthquakes, and increased gas-steam emissions from the crater lake, the alert level of the volcano was raised to yellow again. According to Brad Scott of GNS Science, the crater produced "audible jets of gas" and "broader expanding bubbles of dark lake sediments and debris" throwing material 20-30 meters into the air.

Veniaminof (Alaska Peninsula, USA): From AVO's weekly activity update: "Nearly continuous, gradually fluctuating volcanic tremor and occasional explosions have been observed in seismic data from Veniaminof Volcano throughout the past week. Elevated surface temperatures at the intracaldera cone also have been observed in satellite data throughout the past week. When viewing conditions permit, incandescence at the cone has been observed in night-time web camera views. Day time web camera views also showed that low-level ash and steam emissions have continued throughout the week. A pilot report from 8:00 AM AKDT July 25 described an ash plume to 200-300 feet above the erupting cone and dispersing 15 miles to the south and a "river of lava" flowing from the intracaldera cone.

Popocatépetl (Central Mexico): The rate of small emissions of steam-gas and sometimes ash has risen to more than 3 per hour again, and CENAPRED recorded 150 minutes of low and high frequency tremor.

Santa María / Santiaguito (Guatemala): No significant changes in activity have occurred. A moderate explosion was observed yesterday morning, producing an ash plume about 500 m high. Some avalanches occurred at the lava flows on the southern slope of the dome.

Fuego (Guatemala): INSIVUMEH reports weak strombolian activity ejecting incandescent blocks to up to 100 m and producing small ash plumes about 200 m high, as well as continued lava effusion feeding a flow on the southern side of about 100 m length.