popocatépetl erupción 2021

AVISO DE PRIVACIDAD jueves, octubre 14, 2021 The instrument with the incorrect calibration cell had been used in Mexico since June 1996. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales. On the morning of 9 December personnel from CENAPRED and the Instituto de Geof¡sica, UNAM, made a helicopter overflight during which the presence of a large lava dome, spread across almost over the entire crater floor, was seen. On 18 and 20 December 2006, ash plumes rose to an altitude of ~ 6.7 km and 7.9 km, respectively. In the morning of 11 February, a larger exhalation that lasted ~2 minutes produced ash that was detected on radar images. On 25 March the volcanic alert status was lowered to Yellow-1. At 1630, NOAA/NESDIS reported that the ash cloud was between 5.3 and 6.3 km altitude. On 14 April a period of tremor was accompanied by continuous emissions of dense steam-and-gas plumes with small amounts of ash that rose as high as 1 km and drifted NE. A portable thermal scanner in the helicopter targeting the center of the dome gave a maximum temperature of about 340°C. Periods of tremor were accompanied by emissions of steam, gas, and sometimes ash. On 8 March a vertical ash plume rose 5 km above the summit before being blown NE and, at a higher altitude, SW. Light ashfall was recorded E of the volcano. Activity during January-June 2015. | August An explosion on 12 August generated an ash plume that rose 2.5 km above the 5.4-km-high summit crater and drifted WNW, causing ashfall in Ozumba (18 km W) and Atlautla (16 km W). An explosion was detected at 2312 on 1 August, but cloud cover prevented confirmation of any ejecta. In addition, episodes of harmonic tremor were recorded. CENAPRED noted that recent rain in the area may have contributed to the recent increase in activity. Volcanic activity remained low at Popocatépetl, with emissions of small clouds of steam, gas, and minor amounts of ash. In addition, low-intensity emissions or exhalations with larger quantities of ash occurred tens of times per day. In addition, at 0945 a GOES-8 satellite image showed a plume near the summit extending S. By 1600 the eruption had stopped and radiosonde data established the plume at an altitude of ~9.4 km. Small type-A tectonic events occurred regularly along with incidents of tremor. Larger explosions on 6 November, 18 and 23 December 2003, 9 January, and during 4-10 February 2003 produced ash plumes that reached approximate heights of 4, 2, 2, 3, and 2 km above the crater, respectively. on 18 December. On 9 September during 0815-1605 an episode of frequent small- to moderate-sized eruptions began at Popocatépetl. On 27 March, an ash plume was spotted by the Washington VAAC extending about 100 km NE at 6.4 km altitude. At 1308 a small exhalation occurred accompanied by steam and followed by low-amplitude harmonic tremor lasting 6 minutes. Information Contacts: Centro Nacional de Prevención de Desastres (CENAPRED), Av. Between exhalations, type-A events occurred, many of low magnitude (only three reached near M 3). The measured SO2 value on 30 March was 5,500 tons/day: on 27 April it was 10,600 tons/day. Sulfur dioxide emissions were large enough to be recorded by satellite instruments several times every month during August 2017-February 2018 (figure 104). The plumes occasionally contained slight amounts of ash. Ash plumes rose 1 km. CENAPRED reported two explosions with ash plumes each day during 25-27 October. Thirty-six low- to moderate- intensity seismic events were recorded, including significant exhalations at 0823, 0829, 0857, and 0953; during these events, ash plumes rose to 1 km and drifted NE. Scientists believe the pyroclastic flows melted a small portion of the glacier near the volcano's summit and the glacial meltwater mixed with ash. On days when exhalations exceeded twenty, often (though not always) one or more of the plumes contained small amounts of ash. Satellite imagery showed another ash plume drifting E at an approximate altitude of 9.1 km (30,000 ft) a.s.l. The main tremor episode was accompanied by incandescent fragments that reached up to 500 m distance from Popocatépetl (chiefly NE). Tephra fell NE and was reported as far as 18 km from the volcano. 04360 (URL: https://www.gob.mx/cenapred/); Servando De la Cruz-Reyna, Instituto de Geofísica, UNAM Cd. CENAPRED reported that during 22-28 February steam-and-gas emissions rose from Popocatépetl and crater incandescence was observed at night. 2011: January Information Contacts: Servando De la Cruz-Reyna1,2, Roberto Quaas1,2, Carlos Valdés G.2, and Alicia Martinez Bringas1. Cycles of dome growth and destruction; continuing explosive activity. The Alert Level remained at Yellow, Phase Two. No significant changes have been observed since the explosive activity of 17 December 1998 (BGVN 23:12). | February The volcano remained at Alert Level Yellow Phase II. | February The telemetered seismic station located at Tlamacas (4,000 m elevation on the NW flank) has recorded only normal background levels of seismicity, similar to those observed during the past three years. Where data are available in the interval 1 November-8 January (figure 11), the number of type-B events ranged between 3 and 18 events/day. In some cases additional feature type, elevation, or location details are provided. The volcano remained at Alert Level Yellow Phase III with a 12 km security radius. Crater incandescence was observed at night during 26-27 December. An explosion at 0650 on 28 March generated an ash plume that rose 2.5 km and drifted SE, and ejected fragments 1 km onto the flanks. An infrared camera discloses thermal signatures of erupting plumes. The term 'exhalation' was used extensively in Bulletin reports starting with BGVN 22:03 in 1997. Incandescent tephra was ejected short distances onto the N and E flanks. Explosions were detected during 24-26 July: 4 on 24 July, 4 on 25 July, and 1 on 26 July. This report covers similar activity through July 2017. This event on 5 March seemed very similar to that of 21 December 1994, but perhaps about an order of magnitude lower, an intensity comparable to the levels of activity observed on 26 December 1994. Summary of non-technical reports describing activity at Popocatépetl, 17 February-4 April 1997. No information was available concerning the 23 June mudflow. An ash emission on 9 March at 1304 produced a plume that rose to ~500 m above the summit crater and drifted E. Ash fell in the towns of Huejotzingo (~30 km NE of the volcano) and Puebla (~45 km E). In mid-January scientists saw several small earthquakes that were followed about 90 seconds later by distinct visible "puffs" seen coming from the summit on the TV video monitor. That night some low-amplitude, harmonic tremor signals were detected between 2200 and 2400; afterwards seismicity declined. Then, between 1300 and 1630 on 3 November, four VT events occurred; these M 2.2-3.0 events were located below the crater. | March Large puffs observed at 1525, 1630, and 1730 on 12 February did not rise very high because of a strong wind blowing towards the NE. On 1 September the Alert Level was lowered to Yellow, Phase Two. A remnant ash cloud at 6.1 km altitude was located 175 km W of the summit on 23 February while a new emission was located 35 km NW at 6.4 km altitude. During an overflight on 10 April (figure 73), scientists confirmed that a lava dome had been emplaced in the bottom of the crater between 24 March and 4 April. This report covers the period from early January to 26 February 2000. Small steam-and-gas plume. At 1107 on 21 April a large exhalation took place that lasted 5 minutes and produced an ash column 4 km high. Emission intensity increased again on 30 November and a new continuous plume at 6.4 km altitude extended 370 km NE before dissipating. Increased incandescence from the crater was accompanied by gas and very dark ash emissions that rose 0.8-2 km above the crater. These conditions led to an increase in alert status, from Yellow-1 to Yellow-2. Approximately 30 hours of tremor were recorded by CENAPRED in July and ~18 hours in August, while approximately 9 and 10 hours were recorded in September and October, respectively. Ash plumes rose from the crater on 12 November; ash plumes rose 2 km on 17 November and incandescent material was deposited on the flanks within 1 km of the crater. In late November, this number increased markedly with 78 detected on 24 November and 40 the following day. During 2-7 July, there were small-to-moderate emissions of steam, gas, and ash at Popocatépetl. According to CENAPRED, the mudflow on 24 June did not reach any human settlements. This anomaly can be regarded as another premonitory sign. The ash plumes reported during 7-9 May rose to 5.8 km and drifted mostly E. Additional plumes during 14-15, 18, 20-22, 28-29 May and 31 May-1 June rose to 5.8-6.1 km and drifted for a few hours in multiple directions before dissipating (figure 183). On 20 October four A-type events were followed by 15 minutes of harmonic tremor. There were several 1- to 2-km-long tongues radiating down the volcano's S and SE flanks. Incandescent fragments ejected from the crater landed on the flanks as far as 800 m away. CENAPRED reported that during 16-22 September the seismic network at Popocatépetl recorded 15-89 daily emissions consisting of water vapor, gas, and sometimes ash; cloud cover often prevented visual observations. The eruptions produced steam-and-ash emissions that rose to a maximum height of 1 km above the crater and drifted to the NW. Por arriba de 7000 m: Viento del sureste de 36 km/h The second, a more intense explosion, produced a 3-km-tall plume and threw blocks 2-4 km about the crater. Exhalations are still currently tabulated by CENAPRED. This circular center had a height of 5,105 m elevation. That explosion removed a moderate amount of lava from an inner craterlet on the dome inside the main crater. The transducer and recording devices are property of the National Seismological Service, UNAM; the transmitter/receiver set was donated by the Japan International Cooperation Agency. 1Also at Benemérita Universidad Autónoma de Puebla, México. The tremor continued for about 15 minutes. . The Alert Level remained at Yellow, Phase Two. Interior Minister Santiago Creel told a news conference on 19 December, "We are on maximum alert ... because we have to be ready for any possible contingency regarding the glacier." The Alert Level remained at Yellow Phase II. Erupción del volcán Popocatépetl: VIGILANCIA Foto Twitter. The current estimate as of 16 January 2001 was that ~10-20% of the new dome volume has been blown out by explosions recorded after 18 December 2000. CENAPRED reported hundreds of daily low intensity emissions of gas and steam that often contained minor ash; the plumes generally rose about 1 km above the summit and most often drifted SW. Gas-and-vapor plumes rose 500 m. The Alert Level remained at Yellow, Phase Two. Type-B (low-frequency) events dominated; between March and June a total of 11,678 type-B events was recorded, but only 17 type-A and seven type-AB events were registered. Continued steam-and-gas emissions during March 2017 were accompanied by a few ash-bearing explosions. Two important eruption episodes highlighted activity in December. Crater incandescence was observed at night on 1 and 5 February. Frequent low-intensity short-period exhalations, with occasional ash plumes and incandescent ejecta, and periodic low-frequency tremor episodes characterized activity at the volcano during February and March. On 2 May at 1102 and 5 May at 0054 minor explosions produced ash plumes that rose 1 km above the crater and drifted SW. On 18 May two minor explosions produced a dense gray ash plume and gas-and-steam emissions drifting E and SE (figure 159). Reflectors for survey lines have been replaced on the mountain's accessible N side; and they have been recently surveyed at 5-7 day intervals. Activity remained low to moderate over the next week. CENAPRED reported that during 7-13 October seismicity at Popocatépetl indicated continuing emissions of water vapor, gas, and occasional small amounts of ash. La Comisión Nacional de Protección Civil de México dio detalles sobre la erupción de Popocatépetl y aconsejaron a todos los ciudadanos de Puebla, Morelos y Estado de México no acercarse a la base del volcán. Results of these SO2 flux measurements were as follows: 1) 15 January, 3,680 ± 300 tons/day; 2) 28 January, 2,000 ± 1,000 tons/day. and drifted to the SW. CENAPRED reported that a new 190-m-diameter lava dome in the volcano's crater was observed on 11 December. CENAPRED reported that each day during 10-16 June there were 145-302 steam-and-gas emissions from Popocatépetl, some of which contained minor amounts of ash. The most intense phase lasted three minutes and was followed by high-frequency tremor that lasted an additional five minutes. Figure 8 and table 3 suggest the SO2 flux baseline for 1994 was about 1,000 tons/day, rising to about 4,000 tons/day during the eruption on 24 December. The usual plumes, occasionally bearing ash, rose up to ~1 km above the crater on many days during November-December 2012. Sources: Centro Nacional de Prevencion de Desastres (CENAPRED); Washington Volcanic Ash Advisory Center (VAAC); Associated Press. Mapa de peligros volcanicos del Popocatepetl. MOSCÚ (Sputnik) — El volcán mexicano Popocatépetl registró una explosión a primera hora del 17 de septiembre y lanzó una columna de 2.500 metros de altura... 17.09.2021, Sputnik Mundo 2021 … On 22 October slight ashfall appeared in Amecameca, Tenango del Aire, Tlalmanalco, Ayapango, Temamatla, and Atlautla. On 5 January two explosions generated incandescence in the crater. Satellite imagery, 10-11 March. Stable with moderate steam, gas, and occasional ash plumes during June. Explosions were also detected at 1610 and 1813.During 14-17 June periods of low-amplitude harmonic tremor and high-frequency tremor continued to be detected. The Alert Level remained at Yellow, Phase Two. Los ... respectivamente. On 28 May an explosion at 0503 produced an ash plume that rose more than 2 km and drifted SW, and ejected incandescent tephra 1.5 km onto the NE flank. Cloud cover often prevented visual observations. Prior to mid-October, the daily count of B-type events generally remained below 10, but by 28 October they climbed to 26. Brief, moderately intense emissions of steam and gas, sometimes with light ash puffs, took place throughout the morning of 21 September. Although the summit was obscured by cloud, it was assumed, based on reports from local towns, that ash emissions were continuous. Ash was not visible on satellite imagery. These vents (up to 1 m in diameter) were not observed when the group visited the area 2 years ago. The Alert Level remained at Yellow, Phase Two. Bad weather engulfed the summit in cloud. Numbers of daily type-B events varied greatly during March-June (figure 15). CENAPRED reported that each day during 6-13 October there were 84-143 steam-and-gas emissions from Popocatépetl, most of which contained minor amounts of ash. Explosion ejected incandescent fragments and an ash plume. Harmonic tremor lasted for ~30 minutes. On 9 January, the Washington VAAC reported that an ash plume rose up to ~10 km a.s.l. Ashfalls were reported starting at 2045 in towns E of the volcano (Atlixco, Calpan, and San Nicolas de los Ranchos). Delfín Madrigal No.665. Plume imagery and transport modeling. CENAPRED reported that during 20-25 August emissions of steam and gas contained slight amounts of ash. | October As reported in BGVN 32:04, a lava dome irregularly growing since July 2005 covered the floor of the internal crater. On 21 November a plume with low ash content rose 700 m above the crater and drifted NE. In addition, episodes of harmonic tremor were recorded. As many as 11 explosions were detected daily and variable nighttime crater incandescence was observed. That daily report also showed videos that showed incandescent fragments spreading ~800 m over the upper flanks. Table 14. No sign of the lava dome (number 52) emplaced in early August 2014 was visible. Incandescent tephra was ejected 500 m and fell on the NE flanks. Tremor activity was very high at the beginning of August, and then again during January 2021. Courtesy of CENAPRED. On 14-18 August heavy clouds were reported.
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