Wed, 26 Dec 2001, 06:00
During the week, Popocatépetl emitted small clouds of steam, gas, and generally minor amounts of ash. In addition, episodes of harmonic tremor were recorded. The highest reported ash cloud was produced from an eruption on 29 December at 0432 and rose 5.5-8.8 km a.s.l.
Wed, 19 Dec 2001, 06:00A period of lava-dome destruction and possible new dome growth during 18 to at least 26 December included several explosions and episodes of harmonic tremor. During a 3-minute-long eruption on 19 December starting at 1926, volcanic fragments were hurled 2 km to the E and NE. In addition, an ash cloud was probably produced, but was obscured by meteorological clouds.
Wed, 12 Dec 2001, 06:00
During the week, Popocatépetl emitted small clouds of steam, gas, and generally minor amounts of ash. In addition, episodes of harmonic tremor were recorded. The highest reported ash cloud was produced from an eruption on 17 December at 2213.
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Wed, 5 Dec 2001, 06:00On 10 December at 1830 an increase in activity began at Popocatépetl. There were more ash emissions at the volcano than in comparison to the previous weeks. Several small-to-moderate emissions ejected incandescent fragments about 1 km around the volcano.
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Wed, 28 Nov 2001, 06:00
During the week, Popocatépetl emitted small clouds of steam, gas, and minor amounts of ash. In addition, episodes of harmonic tremor were recorded.
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Wed, 21 Nov 2001, 06:00During the week, Popocatépetl emitted small clouds of steam, gas, and minor amounts of ash. In addition, episodes of harmonic tremor were recorded. During a flight over the volcano on 21 November observers noticed a new 130-m-diameter lava dome growing inside the internal crater.
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Wed, 14 Nov 2001, 06:00
During the week, Popocatépetl emitted small clouds of steam, gas, and minor amounts of ash. There were episodes of increased emissions and seismometers recorded periods of harmonic tremor. According to CENAPRED, this type of activity may be associated with lava dome growth, as occurred on 15 August and 10 September 2001.
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Wed, 7 Nov 2001, 06:00On 10 November at 0324 a small explosive event produced an ash column that rose 1 km above Popocatépetl's summit and drifted to the E. CENAPRED's volcano camera showed incandescent fragments hurled up to 300 m E. During the rest of the week, volcanic activity at Popocatépetl remained low, with emissions of small clouds of steam, gas, and minor amounts of ash.
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Wed, 31 Oct 2001, 06:00
Volcanic activity remained low at Popocatépetl, with emissions of small clouds of steam, gas, and minor amounts of ash. Episodes of low-amplitude harmonic tremor also occurred. An aerial photograph of the crater was taken on 25 October by the Dirección General de Carreteras Federales, SCT.
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Wed, 24 Oct 2001, 06:00On 25 October at approximately 0600 a steam column was observed rising 1-2.5 km above Popocatépetl's crater, drifting to the NW. 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 ~6.7 km.
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Wed, 17 Oct 2001, 06:00
During the week, Popocatépetl emitted small clouds of steam, gas, and minor amounts of ash. In addition, seismometers recorded episodes of harmonic tremor.
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Wed, 10 Oct 2001, 06:00During the week, Popocatépetl emitted small clouds of steam, gas, and minor amounts of ash, and underwent episodes of harmonic tremor.
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Wed, 3 Oct 2001, 06:00
During the week, Popocatépetl emitted small clouds of steam, gas, and minor amounts of ash, and underwent episodes of harmonic tremor. According to reports from the México City MWO to the Washington VAAC, a small eruption on 9 October at 0712 produced an ash cloud that rose 2 km above the volcano and drifted to the W.
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Wed, 26 Sep 2001, 06:00During the week, volcanic activity at Popocatépetl consisted of small emissions of steam, gas, and minor amounts of ash, and episodes of harmonic tremor. Pilots reported that a steam emission rose 4 km above the volcano on 26 September at 1000.
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Wed, 19 Sep 2001, 06:00
During the week, volcanic activity at Popocatépetl consisted of small emissions of steam, gas, and minor amounts of ash, and episodes of harmonic tremor. Analysis of aerial photographs taken on 20 September revealed that the lava dome had continued to grow since it was first observed on 10 August. The dome is growing inside the inner crater, which formed within the summit crater after a dome was destroyed in December 2000.
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Wed, 12 Sep 2001, 06:00During the week, volcanic activity at Popocatépetl consisted of small emissions of steam, gas, and minor amounts of ash.
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Wed, 5 Sep 2001, 06:00
On 9 September at about 0815 an episode of frequent moderate-sized eruptions began at Popocatépetl. The eruptions produced steam-and-ash emissions that rose to a maximum height of 1 km above the crater and drifted to the NW. During the night a small explosion sent incandescent fragments up to 200 m from the crater.
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Wed, 29 Aug 2001, 06:00Volcanic activity remained relatively low at Popocatépetl, with small emissions of steam, gas, and minor amounts of ash.
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Wed, 22 Aug 2001, 06:00
Volcanic activity remained relatively low at Popocatépetl, with small emissions of steam, gas, and minor amounts of ash.
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Wed, 15 Aug 2001, 06:00Small emissions of steam, gas, and small amounts of ash continued at Popocatépetl. The Mexico City MWO reported that on 17 August at 1514 an ash emission produced a cloud that rose to 7.3 km a.s.l. The Washington VAAC reported that GOES-8 satellite imagery did not show an ash plume, but did show an occasional hotspot.
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Wed, 8 Aug 2001, 06:00
The number of small emissions composed of steam, gas, and small amounts of ash increased in comparison to the previous week. The Washington VAAC reported an ash emission on 9 August at 2300 produced an ash cloud that rose to 7.6 km a.s.l. According to CENAPRED, the increase in activity may have been related to several days of intense rain in the area.
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Wed, 1 Aug 2001, 06:00Low-level volcanic activity occurred at Popocatépetl during the week. Several small emissions occurred at the volcano that were mainly composed of steam, gas, and small amounts of ash.
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