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Earth Happenings Archive
November 1, 2001 to November 28, 2001
November 28, 2001
On November 28, a 4.3 magnitude earthquake was felt 50 miles (85 km) W of Caborca, Sonora, Mexico. (National Earthquake Information Center).

On November 28, a 6.3 magnitude earthquake was felt 55 miles (90 km) SE of Tonala, Chiapas, Mexico. (National Earthquake Information Center).

IG's seismic data showed that an approximately 20-minute-long phreatic explosion began at Guagua Pichincha on 26 November around noon. Cloudy conditions prohibited visual observations, but a cloud composed mainly of gas, with small amounts of ash, may have been produced. The volcanic cloud was not visible in satellite imagery; it is believed to have stayed around summit level. Continuous tremor was recorded through at least the rest of the day. The last explosion at Guagua Pichincha occurred on 25 May 2001. (Smithsonian Institution Global Volcanism Program).

November 19, 2001
On November 19, a 5.6 magnitude earthquake was felt 445 miles (715 km) NNE of Lhasa, Xizang (Tibet). (National Earthquake Information Center).

On November 17, a 5.1 magnitude earthquake was felt 90 miles (145 km) ESE of Cuenca, Ecuador. (National Earthquake Information Center).

November 14, 2001
On November 14, a 7.8 magnitude earthquake was felt 435 miles (705 km) North of Lhasa, Xizang (Tibet). (National Earthquake Information Center).

On November 13, a 3.3 magnitude earthquake was felt 20 miles (35 km) Northeast of Oberlin, Kansas. (National Earthquake Information Center).

During the evening of 12 November small ash emissions took place at San Cristóbal Volcano, Nicaragua. The emissions produced ash clouds that remained around summit level. According to the Washington VAAC, on 12 November at 1645 GOES-8 imagery showed a small area of possible ash drifting NW. According to ground observations, moderate volcanic activity occurred until 1800. Ash had dissipated by 2100 and the next day there were no ground reports of volcanic activity. (Smithsonian Institution Global Volcanism Program).

November 12, 2001
On November 11, a 4.0 magnitude earthquake was felt 30 miles (45 km) W of Coeur d'Alene, Idaho. (National Earthquake Information Center).

On November 11, a 6.1 magnitude earthquake was felt 20 miles (35 km) North of Bocas del Toro, Panama. (National Earthquake Information Center).

Beginning on 2 November at about 1800 a swarm of approximately 200 very small, shallow earthquakes was detected for at least 24 hours beneath Mount St. Helens. The earthquakes had magnitudes less than 0, occurred at depths less than 1 km, and were mostly in or under the lava dome's N flank. Such earthquakes are common at Mount St. Helens, but a swarm with so many earthquakes had not been recorded for several years. (Smithsonian Institution Global Volcanism Program).

November 6, 2001
On November 3, a 5.2 magnitude earthquake was felt 190 miles (305 km) North of Baubau, Sulawesi, Indonesia. (National Earthquake Information Center).

During 19-26 October, a lava dome continued to grow in the active crater of Shiveluch volcano, Kamchatka Peninsula, Russia. An explosion during 22-23 October produced a steam-and-gas plume visible from the town of Klyuchi, 46 km from the volcano, rising 4-4.2 km a.s.l. Thermal anomalies in the active dome area were visible on satellite imagery. Spasmodic volcanic tremor and weak, shallow seismic signals (possible collapses and avalanches) were registered. The number of weak shallow seismic events and the intensity of volcanic tremor slowly increased. Shiveluch remained at Concern Color Code Orange. (Smithsonian Institution Global Volcanism Program).

On 25 October at approximately 0600 a steam column was observed rising 1-2.5 km above the crater of Popocatépetl volcano, Mexico, drifting to the Northwest. Ground observations confirmed that the column did not include ash. The MWO reported to the Washington VAAC that another eruption column the same day at 1040 rose to ~1 km. A narrow plume of ash from the eruption was visible extending to the N on satellite imagery. The volcano remained at Alert Level Yellow Phase II. (Smithsonian Institution Global Volcanism Program).

November 1, 2001
On October 31, a 6.9 magnitude earthquake was felt 30 miles (50 km) NE of Kandrian, New Britain, PNG. (National Earthquake Information Center).

On October 31, a 5.1magnitude earthquake was felt 25 miles (35 km) S of Palm Springs, California. (National Earthquake Information Center).

During 19-26 October several gas-and-steam plumes rose above Avachinsky's crater, with the highest plume reaching 1 km and extending 20 km to the SE on 20 October. Seismic activity continued above background levels; ten earthquakes occurred with magnitudes of 1.3-2.1. (Smithsonian Institution Global Volcanism Program).


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