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Archive for August 16th, 2009

Powerful Quake Strikes Seabed Off W Indonesia

Posted by feww on August 16, 2009

A powerful earthquake measuring 6.7Mw strikes off the coast of western Indonesia

The powerful earthquake, originally reported as measuring 7.0Mw, struck in the Kepulauan Mentawai Region, Indonesia, about 110 km WSW of Padang, Sumatra, Indonesia, at a depth of 44.8km on Sunday August 16, 2009, USGS reported.

The earthquake, which was later downgraded by USGS EQ Hazard Program was followed by a cluster of  aftershocks at the time of writing, the largest of which measured 5.9Mw.

[ Note: FEWW Moderators have noted that at least a dozen or so earthquakes which were initially reported as measuring 6.0 or greater, have been subsequently downgraded by USGS without any explanation.  Moderators also noted an  earthquake reported in Alaska, which measured greater than 5.0, was withdrawn from the USGS report last week, again without any explanation.]

See also FEWW comments:

https://feww.wordpress.com/2009/08/03/magnitude-6-9-quake-strikes-gulf-of-california/#comment-3772

https://feww.wordpress.com/2009/08/03/magnitude-6-9-quake-strikes-gulf-of-california/#comment-3797

According to Indonesia’s Meteorological and Geophysics Agency there was NO tsunami warning.

Several people received minor injuries as they fled building in Padang, where a small number of buildings were damage, according to reports.

Earthquake Details

  • Magnitude: 6.7
  • Date-Time
    • Sunday, August 16, 2009 at 07:38:25 UTC
    • Sunday, August 16, 2009 at 02:38:25 PM at epicenter
  • Location: 1.397°S, 99.473°E
  • Depth: 44.8 km (27.8 miles)
  • Region:  KEPULAUAN MENTAWAI REGION, INDONESIA
  • Distances
    • 110 km (70 miles) WSW of Padang, Sumatra, Indonesia
    • 305 km (190 miles) SW of Pekanbaru, Sumatra, Indonesia
    • 560 km (345 miles) SSW of KUALA LUMPUR, Malaysia
    • 960 km (600 miles) WNW of JAKARTA, Java, Indonesia
  • Location Uncertainty: horizontal +/- 5.8 km (3.6 miles); depth +/- 10.2 km (6.3 miles)
  • Parameters: NST=240, Nph=240, Dmin=683.1 km, Rmss=1.04 sec, Gp= 22°, M-type=teleseismic moment magnitude (Mw), Version=8
  • Source: USGS NEIC (WDCS-D)
  • Event ID:  us2009kjak

10-degree Map Centered at 0°N,100°E

us2009kjak
Earthquake Location Map. Source: USGS

Historic Seismicity [USGS]

Historic Seismicity
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Seismic Hazard Map [USGS]
Seismic Hazard Map
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

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Posted in aftershocks, Kepulauan Mentawai, Pekanbaru, seismic activity, seismic hazard report | Tagged: , , , , | 4 Comments »

Meet Bill and Ana, 2009 First Named Storms

Posted by feww on August 16, 2009

2009 Tropical Storm Season Off to Busy Start

bill and ana

The red shaded area covering about a half of Florida panhandle is small area of low pressure in the Gulf of Mexico centered about 130km SW of Tampa, which according to the  NWS TPC/National Hurricane Center is becoming better organized with the possibility of developing a “closed surface circulation” with a more than 50 percent probability of developing into a Tropical Cyclone later today.

GULF  IR
Area of low pressure, Gulf of Mexico, IR image.  Click on the image to enlarge and update.

“THIS SYSTEM IS EXPECTED TO MOVE NORTHWESTWARD OR NORTH-NORTHWESTWARD AT ABOUT 15 MPH TODAY.  INTERESTS ALONG THE GULF
COAST OF FLORIDA SHOULD CLOSELY MONITOR THE PROGRESS OF THIS SYSTEM.” NHC said.

Meanwhile, back in the ocean, Ana and Bill are moving west across the Atlantic Ocean
TS ANA  RAINBOW IMAGE
TS ANA: Click on the image to enlarge and update.

TS ANA: Coastal Watches/Warnings and 5-Day Track Forecast Cone
ANA 024714W5_NL_sm
Coastal Watches/Warnings and 5-Day Track Forecast Cone. Click on the image to enlarge and update.

ana 2
Tropical Storm Force Wind Speed Probabilities – 120 Hours.
Click on the image to enlarge and update.

BILL rb-l
TS BILL:
Click on the image to enlarge and update.

TS BILL: Coastal Watches/Warnings and 5-Day Track Forecast Cone
BILL 024741W5_NL_sm
Coastal Watches/Warnings and 5-Day Track Forecast Cone. Click on the image to enlarge and update.

BILL 024741
Tropical Storm Force Wind Speed Probabilities – 120 Hours. Click on the image to enlarge and update.

FEWW Forecast: Florida, the north and NE Gulf areas may be in for an extremely wet season in 2009.

Posted in Florida deluge, gulf of mexico, path of TS Ana, Path of TS BILL, Tropical Storm watch | Tagged: , , , , | 4 Comments »

California: Biggest Desert in N America

Posted by feww on August 16, 2009

CALIF DESERTIFICATION: NOT IF, BUT WHEN

Desertification of California in the Near Future Is Almost a Certainty

Drought often have significant environmental, economic and social impacts:

  • Shortages of water for agricultural, industrial, municipal and personal uses.
  • Death of livestock.
  • Crop failure, reduced crop yields.
  • Wildfires are more common during periods of drought.
  • Dust storms created by drought-enhanced land erosion and by desertification.
  • Malnutrition, dehydration and related diseases.
  • Famine due to lack of water for irrigation.
  • Social unrest.
  • Mass migration, resulting in internal displacement and international refugees.
  • War over natural resources, including water and food.
  • Reduced electricity production due to insufficient available coolant for power stations and reduced water flow through hydroelectric dams.
  • Snakes have been known to emerge and snakebites become more common.
  • Creates windblown dust bowls which erodes the landscape, damages terrestrial and aquatic wildlife habitat. (Source)

US Drought Monitor


Objective Long Term Drought Indicator Blend Percentiles


Objective Short Term Drought Indicator Blend Percentiles
To view regional drought conditions, go to US Drought Monitor and click on the map. State maps can be accessed from regional maps.

Drought in California’s Central Valley

[Image acquired July 12 – 27, 2009 by EO – Posted Aug 16, 2009]
centralvalleyndvia_tmo_2009193
By the end of July 2009, California was well into its third dry year in a row. The image was made from data collected by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite between July 12 and July 27, 2009. The sensor records the amount of light that photosynthesizing plants absorb and reflect as they grow. The image shows how vegetation fared in 2009 compared to the average based on observations between 2000 and 2008. In places where plants were growing more than average, the image is green. Cream is used to denote average growth, and brown points to less plant growth than average. In this image, dark squares of brown are scattered across much of the Westlands and Tulare Lake water districts. These brown squares are fields that would ordinarily support irrigated crops, but in 2009 the crops were not growing well or the fields lay fallow.

References

NASA image created by Jesse Allen, Earth Observatory, using data provided by Inbal Reshef, Global Agricultural Monitoring Project. Caption by Holli Riebeek and Rebecca Lindsey. [Edited by FEWW]

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Posted in Mojavefication, soil erosion, topsoil, Tulare Lake, Westlands | Tagged: , , , , | 3 Comments »