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A new study, Time dependent changes in volcanic inflation rate near Three Sisters, Oregon, revealed by InSAR, offers a clear look at an intriguing and ongoing episode of activity during the last 15 years.
Injection of about 100,000,000 cubic meters of magma would explain it
It was very active during last summer/fall, then activity dropped dramatically.
scary thing is that this volcano is already in harmonics phase
Earthquake tableDate Time Latitude Longitude Depth Magnitude Quality Location
01.03.2012 06:17:58 63.647 -19.233 1.1 km 2.0 43.59 1.1 km NE of Goðabunga
01.03.2012 03:40:14 63.596 -19.294 4.0 km 1.9 32.4 5.3 km SSW of Goðabunga
29.02.2012 14:07:12 63.658 -19.330 0.1 km 1.2 99.0 4.4 km WNW of Goðabunga
29.02.2012 08:46:49 63.660 -19.147 0.4 km 0.7 99.0 5.6 km ENE of Goðabunga
29.02.2012 07:49:32 63.646 -19.146 0.1 km 1.6 99.0 5.2 km E of Goðabunga
29.02.2012 07:46:54 63.648 -19.149 1.3 km 1.7 99.0 5.1 km E of Goðabunga
29.02.2012 07:42:32 63.660 -19.148 1.3 km 0.9 99.0 5.5 km ENE of Goðabunga
29.02.2012 07:41:19 63.710 -19.267 18.0 km 0.9 99.0 7.9 km N of Goðabunga
29.02.2012 03:43:32 63.555 -19.115 0.1 km 0.3 99.0 2.9 km SSW of Hábunga
28.02.2012 18:25:11 63.639 -19.290 6.0 km 0.9 99.0 2.0 km W of Goðabunga
28.02.2012 16:59:19 63.631 -19.164 1.7 km 2.3 99.0 4.4 km ESE of Goðabunga
28.02.2012 14:59:16 63.896 -19.222 0.1 km 0.7 99.0 4.1 km N of Álftavatn
28.02.2012 11:29:11 63.625 -19.204 2.4 km 0.8 99.0 2.8 km SE of Goðabunga
28.02.2012 11:29:10 63.691 -19.124 6.1 km 0.3 35.63 8.4 km NE of Goðabunga
28.02.2012 11:28:05 63.624 -19.198 0.5 km 0.4 99.0 3.1 km SE of Goðabunga
28.02.2012 11:00:54 63.629 -19.203 2.9 km 0.8 99.0 2.6 km ESE of Goðabunga
28.02.2012 11:00:05 63.628 -19.205 2.1 km 1.1 99.0 2.6 km ESE of Goðabunga
28.02.2012 10:58:28 63.625 -19.208 2.5 km 1.8 99.0 2.7 km SE of Goðabunga
Total earthquakes: 18
But it is also important not to overlay broad interpret the data in the favor of an eruption taking place. As it is impossible to know for sure when Katla volcano erupts, and then how big. All we might get is an new small eruption like in July 2011. As Katla volcano can also have small eruptions like big ones.
Strong gale (more than 20 m/s) is expected in the west side of Iceland tonight and until late tomorrow evening.
Tuesday, 06 March, 2012 at 04:02 (04:02 AM) UTC
n Kamchatka, in the Russian Far East, the Unnamed Volcano has been assigned the highest aviation danger code of "red." The ash and gases that are being spewed from the crater can seriously damage aircraft systems. The volcano is also showing high seismic activity and signs that it may possibly erupt. On average the Unnamed Volcano emits ash and gases 1-2 times a year. Previously the most powerful emissions were in 1956.
Volcanic Activity Summary: Activity of the volcano continuously increases. Seismic activity began to grow on February 12 and increases till now: about 7-19 weak seismic events were registering each day till February 29; about 25-40 weak seismic events and episodes volcanic tremor were recorded each day on March 01-05. Probably an extrude of lava blocks at the top of the dome occur, that prepares a strong explosive eruption of the volcano. According to satellite data, a size and a brightness of a thermal anomaly abrupt increased on March 02. Density clouds obscured the volcano on March 02-05.
KVERT reported high levels of seismic activity at Bezymianny during 17-24 February and a thermal anomaly that was detected daily in satellite images. Two short volcanic tremor episodes were reported on 15 and 22 February. Gas-and-steam plumes, observed in satellite images, drifted NE on 20 and 22 February. The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Geologic Summary. Prior to its noted 1955-56 eruption, Bezymianny volcano had been considered extinct. Three periods of intensified activity have occurred during the past 3,000 years. The latest period, which was preceded by a 1,000-year quiescence, began with the dramatic 1955-56 eruption. That eruption, similar to the 1980 event at Mount St. Helens, produced a large horseshoe-shaped crater that was formed by collapse of the summit and an associated lateral blast. Subsequent episodic but ongoing lava-dome growth, accompanied by intermittent explosive activity and pyroclastic flows, has largely filled the 1956 crater.
Probably there is a preparation of a strong explosive eruption of the volcano. According to satellite data, a size and a brightness of a thermal anomaly abrupt increased on March 02, and continues to increase.
Volcanic cloud height: No ash cloud produced at present.
Other volcanic cloud information: No ash cloud produced at present.
Ijen volcano (East Java, Indonesia): eruption warning due to increased seismic and degassing activity Monday Mar 12, 2012 15:45 PM | Age: 13 hrs BY: TOMPFEIFFER The official alert level for Ijen volcano in East Java, Indonesia, has been raised again to 3 ("alert") due to an increase in activity, our Indonesian correspondant Andi reports.
A new 10 m wide gas vent, which erupted buring gasses, was observed on 10 March at 17 m distance from the shore. Thick steaming, larger than usual, forming a thick white column of sulfur steam 200 m high was already noted since 3 March. Measurements of the lake water temperature at 5 m depth had also shown increased values of 42.70 deg C. On 10 March, the lake surface was 2 meters higher than normal, although this could be attributed to heavy recent rain fall.
Another sign of increased activity is that many leaves of trees and other plants around the crater have died recently, suggesting higher than normal SO2 levels.
Seismic activity has been rising as well. Since 22 Feb, a near contiuous tremor signal has been being recorded. In the interval 22-31 Feb, there were 52 harmonic tremor periods lasting up to 20 minutes, as well as 17 2 low-frequency earthquakes, 38 mostly shallow volcanic quakes. This number increased to 306 tremor episodes lasting up to 25 minutes, 27 low frequency, and 125 mostly shallow volcanic earthquakes during the latest observation period between 1-10 March.
The volcano has already had over 300 eruptions this year
Sakurajima, Japan (CBS) -- Sakurajima continued its second day of violent eruptions on Tuesday, spewing hot rocks and ash, but there was no major damage in the vicinity, the Japanese Meteorological Agency said. The agency said Monday's powerful eruption was the most forceful since 2009.
The volcano is located in the southern prefecture of Kagoshima.
The Meteorological Agency added that the volcano has been erupting steadily for the last two years, but the eruption on Monday turned violent, throwing 50-centimetre (1 foot 6 inches) rocks nearly 1.2 miles away, the furthest since 2009. In response, the Meteorological agency extended the eruption warning to residents living further away from the mouth of the volcano. The volcano has already had over 300 eruptions this year.
Poas volcano (Costa Rica), activity summary Feb 2012: high-temperature fumarolic activity and sporadic small phreatic explosions
During February, Poás activity consisted in strong high-temperature fumarolic activity and sporadic small phreatic explosions, reported by park rangers.
The latest monthly bulletin of Costa Rica's volcano observatory OBSICORI published a more detailed summary of Poás' activity during February summarized as follows: The ultra-acid crater lake had a greenish-gray color with sporadic convection cells visible in the central part carrying sulfur in suspension.
Lake temperature were measured at 44° C, which is a value significantly lower than those measured during most of 2009-2011. The pH value of the lake water was measured at 0.01, slightly "less" acidic than during November 2011 (pH -0.4). The lake volume continued to decrease and its level dropped by 1.16 m between 25 Jan and 24 Feb. Concentrations of sulphate and chlorine increased.