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Massive quake may hit the Himalayas
In what can have huge implications for countries like India, scientists have warned of massive earthquakes in the Himalayas, especially in areas where the surface is yet to be broken by a tremblor.
The study showed that in 1255 and 1934, two great earthquakes ruptured the ground surface in the Himalayas. This runs contrary to what scientists previously thought.
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Date/Time: 1934/1/15 8:43:
Lat: 26.5 Long: 86.5
Region: Bihar, India - Nepal
Mw: 8.1 Ms: n/a
Mb: n/a ML: n/a
Me: n/a Unk: 8.3
Depth: 25 km
Deaths: 10000 , Injuries: n/a
Extreme damage (X) in the Sitamarhi-Madhubani, India area, where most buildings tilted or sank up to 1 m (3 ft) into the thick alluvium. Sand covered the sunken floors up to 1 m deep. This liquefaction damage extended eastward through Supaul to Purnia, India. In the Muzaffarpur-Darbhanga area south of the zone of liquefaction most buildings were shaken apart. Two other areas of extreme damage (X) from shaking occurred in the Munger (Monghyr) area along the Ganges River, India and in the Kathmandu Valley, Nepal. Large fissures occurred in the alluvial areas. The impact was reported to be felt in Lhasa in the north to Bombay (Mumbai) in the south, Assam in the east to Punjab in the west. The earthquake was so severe that in Kolkata, (around 650 km from epicenter) many buildings were damaged and tower of St. Paul Cathedral collapsed. In Sitamarhi, not a single house was left standing.In Rajnagar, near Madhubani all the Kutcha buildings collapsed.
Date/Time: 1833/8/26 17:0:- Local
Lat: 28.3 Long: 85.5
Magnitude: 8 Unk
Depth: - km
Source: Ko et al (1983, 1984), Sha et al (1983-1987)
All Mag 8 + Quakes 314-2012
Date/Time: 1950/8/15 14:9:30
Lat: 28.5 Long: 96.5
Region: Arunachal Pradesh, India/Tibet border area
Mw: 8.6 [p&s] Ms: 8.6 [abe]
Mb: 8.0 [abe] ML: n/a
Me: n/a Unk: 8.6 [g&r]
Depth: n/a km
Deaths: 1530 , Injuries: n/a
Source: noaa noaa
At least 780 people killed and many buildings collapsed in the Nyingchi-Qamdo-Zhamo (Rima, Zayu) area of eastern Tibet. Sandblows, ground cracks and large landslides occurred in the area. In the Medog area, the village of Yedong slid into the Yarlung Zangbo (Brahmaputra) River and was washed away. The quake was felt at Lhasa and in Sichuan and Yunnan Provinces, China. Severe damage (X) also occurred in the Sibsagar-Sadiya area of Assam, India and in the surrounding hills. About 70 villages were destroyed in the Abor Hills, mostly by landslides. Large landslides blocked the Subansiri River. This natural dam broke 8 days later, creating a wave 7 m (23 ft) high which innundated several villages and killed 536 people. The quake was felt (VI) as far away as Calcutta. Seiches were observed in many lakes and fjords of Norway and in at least 3 reservoirs in England. Many sources call this the Assam-Tibet earthquake or even the Assam earthquake, even though nearly all place the epicenter in Tibet. Thus it is possible that the casualties for Tibet are not included in the total, as well as those from the Subansiri River flood. Furthermore, Gu et al. do not give casualty totals for Yedong or other areas of the most severe damage in Tibet. Therefore, the actual casualty toll may be much higher than the value given
Originally posted by PuterMan
The number of quakes reported by USGS in the 7 day reports was 116 so the ANSS number is 14 higher. If you convert all mb and ML value to approximate Mw values then some (5) Mag 5 get uplifted to Mag 6 so you could sya that the accurate figure, if any figure can be accurate, is 135.
Until I got the ANSS figure I though my prediction of 1 x M8, 16 x M7, 120 x M6 was not too bad, but it transpires that instead of 5 x M6 under the final figure is 10 x Mg 0ver and 1 x M8 over, but 1 x 7 under.
Still seeing that no one believed me at the start of last year and many were predicting massive quakes, i sort of feel vindicated. I said it would be quieter and it was.
Originally posted by Jusvistn
I watch the usgs quake data every day, and it seems to be eerily quiet lately. Trends that I have noticed when it quiets down is that a major normally follows. Not sure of any quake watches at this time, but I lost all of my links and accumulated data when my computer crashed.
Originally posted by muzzy
26 aftershocks now at Nay/Lourdes, Pyrenees (4,7 quake on 30/12/2012)
interactive version here
seem to be heading into the hills, with diminishing magnitudes
earthquakes build mountains
The Olot (Garrotxa)volcanic field occupies the NE corner of Spain south of the Pyrenees Mountains about 90 km NNE of Barcelona. The Olot volcanic field consists of a large number of strombolian pyroclastic cones and associated alkali basaltic lava flows and is part of the NE Volcanic Province, which includes the Ampurdán and Selva areas to the SE. The pyroclastic cones are preferentially located at the intersection of E-W and NW-SE faults that cut sedimentary and metamorphic basement rocks. The latest dated eruption at Olot occurred during the early Holocene, and stratigraphic evidence suggests that more recent eruptions have occurred.
Originally posted by dreamfox1
DateTime: Tuesday January 1 2013, 07:35:50 UTC
Region: Kuril Islands
Depth: 48.7 km
Source: USGS Feed
M-type=body wave magnitude (Mb), Version=9
Lat/Long: 46.977 150.655
UTC: 01/01/2013 07:35:50
JST: 01/01/2013 16:35:50
Mag: 5.3 ML
Location: KURILE ISLANDS REGION
Energy Released: 1344.0280 tonnes of TNT
Source: JMA unified hypocenter catalog
F-E Region: Samoa Islands Region
Time: 2013-01-02 19:35:16.1 UTC
Magnitude: 5.0 (mb)
Epicenter: 172.02°W 15.84°S
Depth: 10 km
Status: M - manually revised
2013 1 2 19 35 12.0 -16.25 -172.25 33.0 [color=A23BEC]4.9 SAMOA ISLANDS REGION