Earthquakes

Magnitude 5+ Earthquakes – Global

6.2 Earthquake hits southern Alaska.

5.4 Earthquake hits the Andaman Islands off India.

5.3 Earthquake hits eastern New Guinea, Papua New Guinea.

5.2 Earthquake hits the South Sandwich Islands.

5.0 Earthquake hits Pagan in the North Mariana Islands.

Storms and Floods

Tropical Storms – Roundup of Tropical Storms:

Gl sst mm

Tropical Storm Rachel is located about 390 mi…630 km SSW of the southern tip of Baja California with maximum sustained winds…50 mph…85 km/h. Present movement…WNW or 300 degrees at 14 mph…22 km/h.

Tropical storm 17w (Kammuri), is located approximately 302 nm east-southeast of Iwo To, and is tracking north-northwestward at 06 knots.

NewsBytes:

Bangladesh – Flash floods triggered by heavy rain and water from upstream hill areas across the border inundated vast areas in Bogra and Kurigram districts in last couple of days while the Jamalpur town protection embankment developed a breach under the pressure of rainwater. Over 100 villages of 20 unions of Nageswari, Sadar, Ulipur, Roumari and Rajibpur upazilas of Kurigram district in the last four days.

Village flood 1

India – The death toll due to the massive floods in Meghalaya has risen to 39. Health authorities in the flood-ravaged Garo Hills region of Meghalaya said if precautions are not taken, diseases like diarrhoea, cholera and gastroenteritis may break out once the flood waters recede.

Environment

Hottest Northern Summer on Record

The Northern Hemisphere summer of 2014 was the hottest since record keeping began in 1880, according to the U.S. agency NOAA.

While most highly populated areas escaped excessive heat, the global average temperature in the hottest month of August was 61.36 degrees Fahrenheit, breaking the previous record set in 1998.

August was unusually hot around the Pacific and Indian oceans and in Africa, but cooler in parts of the United States, Europe and Australia.

The world’s oceans in August basically tied June for being the all-time hottest.

August was the 354th consecutive month that temperatures worldwide were above the 20th-century average.

The warming has been so pronounced for nearly 100 years that the last time the world set a monthly record for being the coldest was back in 1916.

Ew140926c

Environment

Global Temperature Extremes

The week’s hottest temperature was 115.9 degrees Fahrenheit (46.6 degrees Celsius) at Hafar Al-Batin, Saudi Arabia.

The week’s coldest temperature was minus 91.7 degrees Fahrenheit (minus 68.7 degrees Celsius) at the U.S. Amundsen-Scott South Pole Station.

Temperatures were tabulated from the more than 10,000 worldwide synoptic weather stations. The United Nations World Meteorological Organization sets the standards for weather observations, and provides a global telecommunications circuit for data distribution.

Volcanos

Roundup of Global Volcanic Activity

Bardarbunga (Iceland): No significant changes have occurred at the ongoing eruption in Holuhraun and the seismic crisis. The eruption itself continues with steady, very large lava output and is on its way to become the largest event in the past 150 years on Iceland. So far, it has erupted approx. 0.5 cubic kilometres of lava, covered 40 square kilometres at an average depth of 12 meters.

Sinabung (Sumatra, Indonesia): The volcano continues to slowly extrude lava feeding the large lava lobe on the southeastern flank. Occasional rockfalls and small pyroclastic flows have been observed in the past weeks. PVMBG reported that RSAM values from Sinabung were low and stable during 12-20 September. Earthquake signals indicating lava-dome instability were recorded and had increased from 96 to 110 events/day since the 5-11 September period. Seismicity also continued to signify growth of the main lava flow on the flanks; incandescent lava was visible at the top, middle, and front of the lava flow.

Kilauea (Hawai’i): (25 Sep) In the past few days, the front of the lava flow heading towards Pahoa has stalled its forward progress. There is still lava activity at a decreased level, but this is only widening the lava field instead of advancing further.

There is an interesting, perhaps coincidental correlation between the drop in surface activity and a decrease in summit tilt (presumably tied to pressure). Unusually, there is no corresponding decrease on Pu’u ‘O’o’s tilt signal, and the public is not in a position to decipher whether this is due to an unusual eruption geometry, or whether there is no real correlation. If surface activity increases within a day or two of the next summit tilt increase, that would suggest some correlation, but for now certainly Pahoa and its infrastructure have been granted a little extra time.

Shishaldin (United States, Aleutian Islands): AVO reported that, although cloud cover sometimes obscured views of Shishaldin during 17-22 September, seismicity indicated that a low-level eruption was possibly continuing. Elevated surface temperatures at the summit were periodically detected in satellite images. Minor steam emissions were recorded by the web cam on 17 September. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.

Tungurahua (Ecuador): Activity at the volcano remains at moderate to high levels, consisting of strombolian and small vulcanian explosions. During the past week, ash plumes have been rising 2-3 km above the volcano. On 18 September ash plumes rose 2 km and drifted mainly NW. Ashfall was reported in Cusúa (8 km NW), Mocha (25 km W), and Chacauco (NW), and windows vibrated at the Tungurahua Observatory (OVT) in Guadalupe (14 km N). An ash plume rose 2 km and drifted NW on 19 September.