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Earth Happenings Archive
July 5, 2001 to July 31, 2001
July 31, 2001
On July 30, a 5.3 magnitude earthquake was felt 145 miles (235 km) SSE of Rabaul, New Britain, PNG. (National Earthquake Information Center).
On July 30, a 3.7 magnitude earthquake was felt 30 miles (50 km) NNW of Ridgecrest, California. (National Earthquake Information Center).

July 26, 2001
On July 26, a 3.2 magnitude earthquake was felt 20 miles (30 km) E of Knoxville, Tennessee. (National Earthquake Information Center).
On July 26, a 6.3 magnitude earthquake was felt 80 miles (130 km) NNE of ATHENS, Greece and was followed by a series of lower magnitude earthquakes. (National Earthquake Information Center).
The Toulouse VAAC reported that the new Etna Sistema Poseidon webcam showed ash emission starting on 20 July. The previous webcam had been damaged by earthquakes near the start of the eruption. SE-drifting ash clouds were detected several times on satellite imagery. An ash cloud was reported to have reached a maximum height of ~5.2 km on 22 July. According to news reports, a state of emergency was declared for the area near Etna on 20 July. As of 24 July the eruption was continuing. (Smithsonian Weekly Volcanic Activity Report).
On 26 July, a strong eruption occurred at the Mayon volcano. Lava fountaining and pyroclastic flows began, and the Alert Level was raised to 5. Villagers living arond the volcano were evacuated. According to the Task Force Mayon, the number evacuated may have reached 46,000 people. An ash cloud rose 10 km above the volcano. Rain mixed with ash, generated lahars that flowed along river channels. Eruptions also occurred on 27 July, and life-threatening pyroclastic flows swept mainly through the Bonga Gully and the Basud Gully to the East. Smaller pyroclastic flows ran through Miisi and Anoling Gullies in the south. The ash column from this explosion was also estimated at 10 km in height. Mayon has entered an eruptive phase and lava is flowing in the Bonga Gully. (Volcano World).

July 24, 2001
On July 24, a 6.0 magnitude earthquake was felt 95 miles (155 km) NE of Iquique, Chile. (National Earthquake Information Center).
Also on July 24, a 4.8 magnitude earthquake was felt 25 miles (40 km) NNE of Road Town, Brit. Virgin Islands. (National Earthquake Information Center).

July 19, 2001
On July 18, a 5.2 magnitude earthquake was felt 55 miles (85 km) WSW of Santo (Luganville), Vanuatu. (National Earthquake Information Center).
Also on July 17, another 4.8 magnitude earthquake was felt 15 miles (25 km) N of Bolzano, Italy. (National Earthquake Information Center).
After eruptions occurred on 25 and 29 June, volcanic activity continued at high levels at Karangetang volcano, Indonesia. During 30 June to 8 July seismographs recorded signals that represented small explosions, avalanches, and an average of 33 multiphase earthquakes per day. During this period a gray plume was emitted from the volcano, and lava avalanches traveled as far as 2.5 km down the Keting River and 750 m down the Kahetang River. The volcano is at Alert Level 3 (on a scale of 1-4). (Smithsonian Weekly Volcanic Activity Report).

July 17, 2001
On July 17, a 4.9 magnitude earthquake was felt 30 miles (50 km) NNW of Ridgecrest, California. (National Earthquake Information Center).
Also on July 13, another 5.5 magnitude earthquake was felt 1600 miles (2565 km) ENE of SAN JUAN, Puerto Rico. (National Earthquake Information Center).
A decrease in volcanic activity at Mayon Volcano began on 3 July that led PHIVOLCS to reduce the Alert Level on 4 July from 5 (hazardous eruption in progress) to 4 (hazardous eruption imminent). In comparison to the previous week SO2 emissions decreased, seismic activity was lower, the rate of inflation of the volcano's edifice decreased, and there was no ash in the steam clouds that emanated from the crater. (Smithsonian Weekly Volcanic Activity Report).

July 12, 2001
On July 10, a 5.1 magnitude earthquake was felt 270 miles (435 km) NW of Xining, China. (National Earthquake Information Center).
Also on July 10, another 5.1 magnitude earthquake was felt 15 miles (25 km) ESE of Erzurum, Turkey. (National Earthquake Information Center).

July 10, 2001
On July 8, a 3.4 magnitude earthquake was felt 10 miles (15 km) W of SALT LAKE CITY, Utah. (National Earthquake Information Center).
On July 7, a 7.6 magnitude earthquake was felt 70 miles (110 km) SSW of Arequipa, Peru. (National Earthquake Information Center).
The Tungurahua volcano has been producing small explosions daily since 17 June. The eruptions are usually occurring without warning. The light ash fall that is produced often damages crops in the area. (Volcano World).

July 5, 2001
On July 3, a 3.9 magnitude earthquake was felt 15 miles (20 km) SSE of Hollister, California. (National Earthquake Information Center).
On July 5, a 6.6 magnitude earthquake was felt 90 miles (145 km) SSE of Puquio, Peru. (National Earthquake Information Center).
On June 29, an explosion at Sheveluch, Kamchatka, Russia, sent an ash-gas plume to a height of 3700 (12,000 ft.) ASL. Pyroclastic flows ~2.5-3 km long were observed. On June 30, an ash-plume rose 1000 m above the dome. On July 1, the explosive activity was continuing. (Volcano World).


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