Looks Like Volcano Time
OK, we had the “Super Moon”, then it got all quiet on the earthquake front. After a bit of a pause, Grimsvotn in Iceland blew off a bit. Now a couple of more are chiming in. (Not counting the dozen or so that are either always making some rumble or have been sporadically active for “a while”…)
Some Volcano Links
http://pangea.stanford.edu/~dsinnett/Pages/Links.html has a nice collection of links to volcano monitor pages. Just click the pictures for the different volcano observatories.
The Smithsonian page:
The Volcanism Blog:
From the Smithsonian site, we have (updated on Wednesdays, so now about 4 days out of date):
New Activity/Unrest: | Aso, Kyushu | Dieng Volcanic Complex, Central Java (Indonesia) | Kliuchevskoi, Central Kamchatka (Russia) | Popocatépetl, México | Puyehue-Cordón Caulle, Central Chile | Yasur, Vanuatu (SW Pacific)
I make that 6 that were “new” as of almost a week ago, and more since then…
In the “ongoing” bucket they have:
Ongoing Activity: | Batu Tara, Komba Island (Indonesia) | Dukono, Halmahera | Karangetang [Api Siau], Siau I | Karymsky, Eastern Kamchatka (Russia) | Kilauea, Hawaii (USA) | Kizimen, Eastern Kamchatka (Russia) | Rabaul, New Britain | Sakura-jima, Kyushu | Shiveluch, Central Kamchatka (Russia) | Villarrica, Central Chile
A nice “10”…
OK, the “biggie” right now looks like the one in Chile “Puyehue Cordon Caulle”:
Posted by admin in activity reports, Chile, eruptions, Puyehue.
The Chilean Servicio Nacional de Geología y Minería (SERNAGEOMIN) has issued its latest bulletin on the activity at Puyehue-Cordón Caulle: Reporte Especial de Actividad Volcánica No 36, 11 June 2011 (the PDF has not been posted yet). Overall the eruption shows no sign of coming to an end: the key word in this bulletin, as the preceding ones, is ‘stability’, although SERNAGEOMIN emphasizes that the behaviour of the volcano may change and the intensity of the eruption increase at any time. There is continuing ashfall and a high risk of lahars.
Seismic activity at Cordón Caulle ‘showed no major changes compared with yesterday’, with an average of 5 events per hour, with magnitudes not exceeding 2.3. The earthquakes have been located to the area SE of Cordón Caulle, the majority at depths of between 3 and 5 km.
The ‘continuous signal of tremor’ observed since the beginning of the eruption is continuing in a stable manner, associated with degasification and the movement of material towards the surface.
The eruption plume ‘has shown an oscillating pattern with respect to its altitude’, reaching a height of approximately 4.0-4.5 km in the morning of 11 June and trending towards the east. The plume has shown a ‘slightly whiter’ colouring than on previous days.
The alert level for Puyehue-Cordón Caulle remains Red 6, ‘moderate eruption’.
I saw a “crawler” on one of the TV news shows (Fox? CNN? I forget…) which said ash was falling in both the capital of Uruguay and the capital of Argentina at the same time.
The Chile Forum has a couple of nice aerial shots of the place, along with travel advisories:
The Chile Ministry of the Interior and Public Safety site is here:
For those wishing fast, but Spanish language updates, they have notices such as these:
13-06-2011 Sismo de mediana intensidad en las regiones de Coquimbo, Metropolitana, Valparaíso, OHiggins, El Maule
Un sismo de menor intensidad se percibió a las 1:21 horas enlas regiones de Coquimbo, Metropolitana, OHiggins y El Maule. Las intensidades en la escala de Mercalli son…
12-06-2011 Sismo de menor intensidad en las regiones de Tarapacá y Antofagasta
Un sismo de menor intensidad se percibió a las 19:26 horas en la región de Tarapacá. Las intensidades en la escala de Mercalli son las siguientes: Región de TarapacáAlto Hospicio,…
12-06-2011 SERNAGEOMIN levanta condición de evacuación en algunas localidades de Región de Los Ríos y Región de Los Lagos
Permanecen en condición de evacuación en la Región de Los Ríos, los sectores de la comuna de Lago Ranco y en la Región de los Lagos…
Basically, they say minor seismic activity in several places. Some regions are being evacuated, such as The Rivers and The Lakes.
The impression I get as that they think this is going to continue for a while, and maybe get worse.
Not to be shoved too far out of the news, Mexico has an eruption at Popcatepetl (toward the south) as well. This link has nice pictures:
The Smithsonian page notes:
CENAPRED reported that during 31 May-1 June steam-and-gas emissions from Popocatépetl occasionally contained small amounts of ash. At 0637 on 3 June an ash plume rose 3 km above the crater following seismic tremor. The lower-altitude portion of the plume drifted W (towards the state of Morelos) and the higher-altitude portion of the plume drifted ENE (over Puebla, 40 km E). Within a few hours ashfall was reported in the Morelos state, municipalities of Tetela del Volcán (20 km SW), Zacualpan (31 km SW), Jonacatepec (43 km SW), and Axochiapan (60 km SSW). At 2112 high-frequency, low-amplitude tremor was detected that was followed by an ash plume at 2116 that rose 1 km above the crater and drifted W. By 2130 activity had returned to normal levels. On 4 June an ash plume rose 1 km above the crater and drifted SSW at lower altitudes and NE at higher altitudes.
Geologic Summary. Popocatépetl, whose name is the Aztec word for smoking mountain, towers to 5,426 m 70 km SE of Mexico City and is North America’s second-highest volcano. Frequent historical eruptions have been recorded since the beginning of the Spanish colonial era. A small eruption on 21 December 1994 ended five decades of quiescence. Since 1996 small lava domes have incrementally been constructed within the summit crater and destroyed by explosive eruptions. Intermittent small-to-moderate gas-and-ash eruptions have continued, occasionally producing ashfall in neighboring towns and villages.
Gee… quite for 50 years, then active. Where have I seen “60 years” before… ;-)
The Mexican National Center For The Prevention of Disasters has more info:
Jun 12 11:00(16:00 GMT)
En las últimas 24 horas se registró únicamente 1 pequeña exhalación, acompañada por vapor de agua y gas. Los demás parámetros de monitoreo se mantienen sin cambios importantes. Desde hoy por la mañana se ha podido observar al volcán con poca actividad fumarólica (imagen).
El semáforo de alerta volcánica continúa en AMARILLO fase 2. Se mantiene la probabilidad de los siguientes escenarios: exhalaciones moderadas, algunas con emisiones de ceniza; esporádicas explosiones de nivel bajo a moderado con probabilidad de emisión de fragmentos incandescentes a corta distancia del cráter y leve incandescencia en el cráter del volcán observable durante la noche.
1. Continuar con el radio de seguridad de 12 km, por lo que la permanencia en esa área no está permitida.
2. Mantener el tránsito controlado entre Santiago Xalitzintla y San Pedro Nexapa, vía Paso de Cortés.
3. A las autoridades de Protección Civil, mantener sus procedimientos preventivos, de acuerdo con sus planes operativos.
4. A la población, estar atenta a la información oficial que se difunda.
Some minor gas and water vapor, maintain a 12 km security radius, it is “Yellow phase 2” condition as something more could happen and there are still signs of activity in the crater. (As a rough ‘free summary translation’).
OK, h/t to George and R. de Haan in tips, where they have been discussing this for “a while” as I was working on some promised financial postings…
Eruption of possibly Mallahle volcano, Eritrea region of Ethiopia.
IR plume can be seen on the left side of this:
Considering the size of the earthquakes accompanying the eruption, it might be pretty large.
From comments on Erik Klemetti’s blog.
While R. de Han added:
R. de Haan
More info about the Rift Valley Eritrea eruption.
Pieter De Leeuw (Netherlands) has traced the eruption as probably coming from the Nabro volcano, a crater with a diameter of 8 km. We agree with him. Nabro volcano has no records of recent eruptions.
Taking a look at the USGS quake map for the area finds a nice sized quake:
Magnitude 5.7 – ERITREA – ETHIOPIA REGION
2011 June 12 21:03:23 UTC
This event has been reviewed by a seismologist.Magnitude 5.7
Date-Time Sunday, June 12, 2011 at 21:03:23 UTC
Monday, June 13, 2011 at 12:03:23 AM at epicenter
Time of Earthquake in other Time Zones
Location 13.530°N, 41.625°E
Depth 9.9 km (6.2 miles)
Region ERITREA – ETHIOPIA REGION
Distances 133 km (82 miles) WNW of Assab, Eritrea
200 km (124 miles) SW of Al Hudaydah, Yemen
233 km (144 miles) E of Mekele, Ethiopia
353 km (219 miles) SE of ASMARA, Eritrea
Location Uncertainty horizontal +/- 17.1 km (10.6 miles); depth +/- 2.8 km (1.7 miles)
Parameters NST=113, Nph=114, Dmin=320.6 km, Rmss=0.88 sec, Gp= 72°,
M-type=regional moment magnitude (Mw), Version=6
Source USGS NEIC (WDCS-D)
Event ID usc00045xc
Australia / New Zealand
This is a map of the Australia / Indonesia / New Zealand area:
I note in passing that a 6.0 happened near Christchurch New Zealand, also a place more or less on top of a volcano:
Magnitude 6.0 – SOUTH ISLAND OF NEW ZEALAND
2011 June 13 02:20:50 UTC
This event has been reviewed by a seismologist.Magnitude 6.0
Date-Time Monday, June 13, 2011 at 02:20:50 UTC
Monday, June 13, 2011 at 02:20:50 PM at epicenter
Time of Earthquake in other Time Zones
Location 43.580°S, 172.740°E
Depth 9 km (5.6 miles)
Region SOUTH ISLAND OF NEW ZEALAND
Distances 13 km (8 miles) NNE of Christchurch, New Zealand
207 km (128 miles) SSE of Westport, New Zealand
292 km (181 miles) SW of WELLINGTON, New Zealand
323 km (200 miles) NNE of Dunedin, New Zealand
Location Uncertainty horizontal +/- 13.9 km (8.6 miles); depth +/- 2.8 km (1.7 miles)
Parameters NST= 74, Nph= 74, Dmin=17.8 km, Rmss=1.4 sec, Gp= 86°,
M-type=regional moment magnitude (Mw), Version=7
Source Institute of Geological and Nuclear Sciences, Lower Hutt, New Zealand
Event ID usc000466f
One can only hope that this is an “aftershock” of the recent large quake and NOT the start of “something new”…
From Russia, with Smoke
Also, in Russia, R. de Haan noted:
R. de Haan
About the current Kizimen eruption
There is a nice photo gallery of the May activity here:
http://www.kscnet.ru/ivs/kvert/current/kzm/index.html with descriptive text in Russian.
I found those at this page, that looks to have a lot of links to other histories and photos:
VOLCANO: KIZIMEN (1000-23)
Current AVIATION COLOR CODE: RED
Notice Number: 35-11
Volcano Location: 55°08’N, 160°19’E;
Area: Kamchatka, Russia
Summit Elevation: 8151 ft (2485 m)
Prognosis Volcanic Activity: Seismic and explosive activity of the volcano continues. Strong ash explosions up to 49,200-32,800 ft (15-10 km) ASL could occur at any time. Ongoing activity could affect international and low-flying aircraft.
Volcanic Activity Summary: Seismic activity of the volcano was changing during June 12-13. Although a magnitude of volcanic tremor in the area of Kizimen decreased from 04:52 UTC on June 12, and later additional sharp decreased from 08:45 UTC on June 12, ash plumes continued to detected on satellite images during June 12-13. According to satellite data, an ash plume extending about 470 mi (760 km) to the east from the volcano was noted at 04:08 UTC on June 13 (20110613/0408Z). According to the seismic and satellite interpretation, a height of ash plumes do not exceed 19,352 ft. A bright thermal anomaly continues to registering over the volcano.
According to seismic data, a magnitude of volcanic tremor in the area of Kizimen began increases again from 04:00 UTC on June 13.
Volcanic cloud height: up to 19,352 ft (according to seismic or satellite interpretation)
Other volcanic cloud information: an ash plume extending to the east from the volcano > 470 mi on this time
Remarks: History of Kizimen eruptions is unknown. We have incomplete data about only one eruption in 1928-1929 which were likely moderate explosive (or explosive-effusive) events. Tephrachronological data point out several catastrophic eruptions in evolution of this volcano.
OK, looks to me like “Stuff Happens” and some of it is “happening now”…
From here on down, I’m just going to leave the usual quake maps so folks can see what’s going on.
Asia and Russia
While we don’t want to forget about Japan, it has very much quieted down. So just one panel. If you want more detail, see:
Here is a “live view” of South America so you can watch anything “new” that develops there:
And remember, I have a dedicated CSZ page with closeups
Action Closer to Me
The one annoying thing on the California map is the way all the “Action” is taking the line up the Hayward / Calaveras side. That’s “not good” for the East Bay… It is “due”… With 424 total quakes on this map as I type, it’s a bit active all over California again.
As I live in California, it makes it easier for me if I keep them in the list where I can see what’s shaking near me.
Original Image, with captions and description. The original is interactive with clickable regions for ‘close ups’.
Here is an alternative view of things with the fault lines highlighted:
Also from R. de Haan in tips was a link to this nice page about Icelandic Volcanoes that sees some harmonic tremor at Katla.
You can click on particular spots on the map at this link and see the tremor being recorded:
From mousing around there, it looks like most of the boxes are blank, but several have some readings. I don’t know particularly what importance to attach to that…
Looks like “interesting times”… I hope it just doesn’t get TOO interesting ;-)