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Archive for the ‘Riyadh’ Category

Saudi Quakes Oil Drilling Activity Related?

Posted by feww on May 19, 2009

Two Quakes Strike Arabia

A Large Swarm of Earthquakes May Follow

Two quakes measuring 4.6 and 4.9 struck Saudi Arabia on Sunday and Tuesday receptively. The two seismic events may be followed by a large swarm of earthquakes in the coming days.

Moderators are watching the events with interest because the quakes are concentrated close to Harrat Lunayyir, a basaltic volcanic field located in NW Saudi Arabia with some 50 volcanic cones. According to USGS record, “Harrat Lunayyir is one of the smallest of the Holocene lava fields of Saudi Arabia,” which last erupted about 1,000 years ago.

FEWW is carefully analyzing the likelihood whether the quakes were caused by petroleum drilling activity, and will post its findings soon.

us2009gvaj -1 arabia

Earthquake Details:

Magnitude: 4.9
Date-Time:

  • Tuesday, May 19, 2009 at 06:38:33 UTC
  • Tuesday, May 19, 2009 at 09:38:33 AM at epicenter

Location: 25.105°N, 37.788°E
Depth: 10 km (6.2 miles) set by location program
Region: WESTERN SAUDI ARABIA
Distances:

  • 115 km (70 miles) NNW of Yanbu` al Bahr, Saudi Arabia
  • 185 km (115 miles) SE of Al Wajh, Saudi Arabia
  • 195 km (120 miles) WNW of Al Madinah, Saudi Arabia
  • 915 km (560 miles) W of RIYADH, Saudi Arabia

Location Uncertainty: horizontal +/- 12.6 km (7.8 miles); depth fixed by location program
Parameters:  NST= 20, Nph= 20, Dmin=>999 km, Rmss=0.86 sec, Gp=155°, M-type=body wave magnitude (Mb), Version=7
Source: USGS NEIC (WDCS-D)
Event ID:  us2009gvaj

Earthquake Details:

Magnitude:  4.6
Date-Time:

  • Sunday, May 17, 2009 at 19:50:07 UTC
  • Sunday, May 17, 2009 at 10:50:07 PM at epicenter
  • Time of Earthquake in other Time Zones

Location: 25.356°N, 37.632°E
Depth: 10 km (6.2 miles) set by location program
Region WESTERN SAUDI ARABIA
Distances:

  • 145 km (90 miles) NNW of Yanbu` al Bahr, Saudi Arabia
  • 155 km (95 miles) SE of Al Wajh, Saudi Arabia
  • 220 km (135 miles) WNW of Al Madinah, Saudi Arabia
  • 930 km (570 miles) W of RIYADH, Saudi Arabia

Location Uncertainty:  horizontal +/- 12 km (7.5 miles); depth fixed by location program
Parameters: NST= 21, Nph= 21, Dmin=546.8 km, Rmss=0.81 sec, Gp=144°, M-type=body wave magnitude (Mb), Version=7

Source: USGS NEIC (WDCS-D)

Event ID:  us2009gtbi

Posted in Al Madinah, Al Wajh, Desert Volcano, Riyadh, WESTERN SAUDI ARABIA | Tagged: , , , , | 4 Comments »

Image of the Day: Sandstorm in Saudi Desert

Posted by feww on March 11, 2009

She buries me; she buries me not.

saudi-sand-storm-ap1
A massive sandstorm engulfs Riyadh, capital of Saudi Arabia. Photo Jad Saab/AP. Image may be subject to copyright.

APTOPIX Mideast Saudi Arabia Weather
A huge sandstorm engulfs the Saudi capital of Riyadh, Saudi Arabia, Tuesday, March 10, 2009. The storm, which was still raging hours after it started, disrupted flights at the city’s King Khalid International airport, with weather authorities announcing that visibility would drop to zero, and warning residents to take precautionary measures. (AP Photo/Jad Saab) – AP (signonsandiego).

arabian_dust-storm
Dust plumes swept across the Arabian Peninsula in early March 2009, stretching from the Red Sea to the Persian Gulf and beyond. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this image on March 11, 2009.   Image source: GSFC

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Posted in dust bowl, dust storm, Riyadh, Rub’ al Khali, sand seas | Tagged: , , , , | 6 Comments »