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Archive for October 29th, 2009

VolcanoWatch Weekly [28 Oct 2009]

Posted by feww on October 29, 2009

VOW: Nevado del Huila

Eight of Colombia’s 15 volcanoes have erupted in the last 100 years, and three of them since 1990: Galeras, Nevado del Huila, and Nevado del Ruiz.

nevado del huila
Nevado del Huila emitting ash [October 17, 2009.] As of posting more than a 1,000 tremors have been detected since Huila became restless on October 16, 2009. Photo: INGEOMINAS/Colombian Govt.

Nevado del Huila Emits Ash

Nevado del Huila became active on October 16, 2009. Tremors indicating movement of fluid within the volcano, surface emissions of gas and ash, and other volcanic activity have been reported recently by the Colombian Institute of Geology and Minerals (INGEOMINAS). Towering emissions of volcanic ash have also been reported almost daily.    A column of ash reached flight level 11,000 meters (36,000 feet) on October 28, 2009. This natural-color image from the Moderate-resolution Imaging Spectroradiometer (MODIS) aboard NASA’s Terra satellite captured the plume at 10:15 a.m. Thick gray ash is visible over the summit of Nevado del Huila, with a diffuse plume stretching northwest (towards the upper left corner of the image).     According to the newspaper El Liberal, ashfall in the surrounding areas was a nuisance, but not yet a serious risk to health. INGEOMINAS assigned Huila an alert level of Orange, meaning an eruption is probable within days or weeks. NASA image by Jeff Schmaltz, MODIS Rapid Response, Goddard Space Flight Center. Caption by Robert Simmon.

Volcano of the Week Details

Name: Nevado del Huila
Country: Colombia
Region Name: Colombian Andes
Volcano Type: Stratovolcano
Last Known Eruption: 2009
Summit Elevation: 5,364 m (17,598 feet)
Latitude: 2.93°N
Longitude: 76.03°W
Source: GVP

Huila, the highest active volcano in Colombia, is an elongated, N-S-trending snow-capped stratovolcano, constructed inside an old caldera. The 5364-m-high volcano is seen here from the SW, with the northern peak (La Cuesta) on the left and the lower southern peak on the right flanking Pico Central, the volcano’s high point. Two persistent steam columns rise from the southern peak.  Photo by Juan Carlos Diago, 1995 (courtesy of Bernardo Pulgarín, INGEOMINAS, Colombia). Caption: GVP

An explosive eruption ruptured the summit of Nevado del Ruiz on November 13, 1985, spewing about 20 million cubic meters of volcanic ash and rocks into the air. Forty-meter thick lahars traveling at velocities of up to 50 kilometers per hour destroyed the town of Armero 74 km away from the explosion crater, killing more than 23,000 people. [Source: USGS]

SI /USGS Weekly Volcanic Activity Report
(21 October – 27 October 2009)

New activity/Unrest:

GVP Volcano News:

PHIVOLCS reported that on 28 October a minor ash explosion from Mayon produced a brownish ash plume that rose 600 m above the crater and drifted NE.

Based on web camera views, INGEOMINAS reported that on 21 October continuous gas emissions rose from Nevado del Huila and pulses of ash emissions produced plumes that drifted E. Observations during an overflight on 23 October revealed that gas-and-ash emissions originated from two locations.

Ongoing Activity:

Related Links:

FEWW Volcanic Activity Forecast

Other Related Links:

Recent Posts on Chaitén:

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Typhoon MIRINAE “In-Touch” with LUPIT

Posted by feww on October 29, 2009

Typhoon MIRINAE – Update on 31 Oct 2009 – Time: 03:00UTC

TS MIRINAE – UPDATE 31 October 2009

Typhoon MIRINAE – Update on 30 Oct 2009 – Time: 15:00UTC

  • Position: 14.5N 122.7E
  • Location: 240 km (130 nm) east of Manila, Philippines
  • Maximum  Sustained Winds: 158 km/h (85 kt)
  • Maximum Wind Gusts : 195 km/h (105 kt)
  • Movement and speed: Tracking  west-southwest [255º] at 24 km/h (13 kt) – has slowed down
  • Maximum Significant Wave Height: 9 m (27 feet)

Mirinae has slightly weakened, but still maintains a robust radial outflow. It’s expected to make landfall in Quezon province by 18:00UTC, and reemerge in the South China Sea, further weakened, about11 hours after landfall.

track pagasa 2
Mirinae [Santi] Track by the Philippines DOST PAGASA. Click image to enlarge and update.

DP 2
Typhoon Mirinae [SANTI] MTSAT IR1. Still Image. Click image to enlarge and update.

Areas Under Highest Storm Warning Signal

Signal No.3  (100-185 kph winds)

  • Quezon
  • Polillo island
  • Bulacan
  • Bataan
  • Rizal
  • Cavite
  • Laguna
  • Batangas
  • Oriental Mindoro
  • Lubang Island
  • Marinduque
  • Camarines Norte
  • Camarines Sur
  • Catanduanes
  • Metro Manila

Signal No. 2  (60-100 kph winds)

  • Aurora
  • Quirino
  • Nueva Ecija
  • Tarlac
  • Pampanga
  • Zambales
  • Occidental Mindoro
  • Albay
  • Burias Island

Typhoon MIRINAE – Update on 30 Oct 2009 – Time: 03:00UTC

mirinae 30-10-09
MIRINAE – MTSAT IR Still Image. Click Image to Enlarge and Update !

The Eye of the typhoon should make land fall on Luzon at or about 18:00 UTC today [Oct 30, 2009]

  • Position: 15.0N 125.2E
  • Location: 510 km (275 nm) east of Manila, Philippines
  • Maximum  Sustained Winds: 167 km/h (90 kt)
  • Maximum Wind Gusts : 204 km/h (110 kt)
  • Movement and speed: Tracking west at 31 km/h (17 kt) – fast moving
  • Maximum Significant Wave Height: 10 m (30 feet)
  • Wind Flux: 8.1000E+02
  • Accumulated Cyclone Energy: 5.7550E+04
  • Power Dissipation Index: 4.2202E+06

5-day track 30-10-09
Typhoon MIRINAE 5-Day Projected Track. Source: JTWC.  Click image to enlarge.

Typhoon MIRINAE 3-Day Projected Track. Source: JMA. Image may be subject to copyright.
Click image to enlarge.

PAGASA track

Typhoon MIRINAE [Typhoon SANTI in the Philippines] track by Dost PAGASA, Philippines. Click image to enlarge.

23w sat
Click image to animate.

Animation: Best Track

Satellite Imagery (Constant Illumination)

More links are posted throughout this page.


Typhoon MIRINAE – Update 29 Oct 2009

MIRINAE  “fine-tuned” by LUPIT

Typhoon Mirinae  in “direct contact” with the remnants of LUPIT

Background: MIRINAE: Another Cyclone Heading Philippines Way

On 29 October 14:45 UTC Typhoon Mirinae  was located at near 15.6N,  128.7E, approximately 890 km (480 nm) east of Manila, Philippines, tracking westward at a forward speed of about 22 km/h (12 knots).  It’s maximum significant wave height was estimated at 11 meter (33 feet).

  • Maximum  Sustained Winds: 167 km/h (90 knots)
  • Maximum Wind Gusts :   204 km/h (110 knots)

Typhoon MIRINAE Status
On 29 October 03:45 UTC Typhoon Mirinae  was located at 15.8N, 131.4E, about 1200km (650nm) east of Manila, Philippines, tracking westward at a forward speed of 27 km/h (15knots). It’s maximum significant wave height was estimated at 10 meter (30 feet).

Typhoon Mirinae – MTSAT IR – Still Image recorded on October 29, 2009 at 00:30 UTC. Note the poleward arm linked to the remnants of LUPIT circling to the east of Kamchatka Peninsula, Russia. Click image to enlarge and update. Source: Digital Typhoon.

The poleward arm of Typhoon MIRINAE stretches out like an umbilical cord to meet the remnants of LUPIT circling to the east of Kamchatka Peninsula, Russia. It seems like the task LUPIT failed to perform is now passed on to MIRINAE. Will she succeed wreaking more havoc on the fatally injured  Manila, Luzon and the Philippines? Will she be the “mercy” typhoon?

23w sat
Click image to animate.

Basic Information

DOB:   2009-10-27 06:00:00 UTC
AGE:   45 hours / 1.55  days
Minimum Pressure:   955 hPa
Maximum Wind Speed:  150 km/h ( 80 knots)
Maximum Wind Gusts: 215km/h (115 knots)
Max Radius of Storm Wind:  260 km /140 nm [highly symmetrical]
Diameter of Storm Wind:  260 km /140 (nm)
Radius of Gale Wind:  410 km / 220 (nm)
Diameter of Gale Wind:  670 km /360 (nm)
Distance traveled:  1,355 km
Average Speed: 30.1 km/h / 783  km/day
Range of Movement: Latitude 1.4, Longitude 12.3
Wind Flux: 5.1000E+02
Accumulated Cyclone Energy:  3.5050E+04
Power Dissipation Index:  2.5328E+06
Typhoon Name:  Mirinae means “Milky way” in South Korean

Source: Digital Typhoon / edited by FEWW

track forecast
TY MIRINAE 5-day track forecast. Source: JTWC

Best Track:

Satellite Imagery – animated(Constant Illumination)
Satellite Imagery- animated  (Sun Illumination)

Previous entries:

Source Page: FEWW Satellite Imagery


Loops/Animations (MTSAT/NOAA/SSD)

Related Links:

Previous Storms:

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