Earthquakes list May 21, 2011

Last update: May 22, 2011 at 8:28 am by By

M 4.6      2011/05/22 07:21     Depth 10.1 km      OFF THE COAST OF OREGON
May 21, 2011 at 11:21:37 PM at epicenter
Moderate ridge earthquake at a safe distance out of the Oregon Coast. This area has multiple moderate to strong earthquakes since many months. The scars on the ocean surface (see linked satellite picture) are showing very well the stressed Ocean bottom.
229 km (142 miles) W of Coos Bay, Oregon
Satellite map of the greater epicenter area

M 6.1      2011/05/21 21:17     Depth 19.8 km     KERMADEC ISLANDS, NEW ZEALAND
May 22 – 09:17:00 AM at epicenter
A very strong shallow earthquake on top of the subduction zone in an unpopulated island area (only a few islands are manned with scientific teams).
Not powerful enough to generate a tsunami
172 km (107 miles) S (189°) from Raoul Island, Kermadec Islands
Satellite map of the greater epicenter area

M 4.6      2011/05/21 19:10    Depth 1.0 km     ICELAND
local time 19:10
Please read our in-depth report about this earthquake – Click here
Moderate earthquake which may be volcanic in origin.
UPDATE 21:04 UTC : What we expected has been proved right, Iceland Grimsvotn volcano which is located below the Vatnajokull glacier has started its eruption.
Approx. 50 km from the Vatnajo…. (you know).
Very close to Laki. Laki or Lakagígar (Craters of Laki) is a volcanic fissure situated in the south of Iceland, not far from the canyon of Eldgjá and the small village Kirkjubæjarklaustur, in South-East Iceland. Lakagígar is the correct name as the Laki mountain itself did not erupt, but fissures opened up on each side of it (source Wikipedia)
168 km E Reykjavík (pop 113,906
Satellite map of the greater epicenter area (green arrow)

M 4.6      2011/05/21 18:29     Depth 21.6 km     PUERTO RICO REGION
02:29:16 PM at epicenter
Moderate harmless seaquake approx. 50 km from the Western Puerto Rican coast and 70 km from the Dominican Republic coast.
66 km (41 miles) NW (318°) from Aguadilla, PR
158 km (98 miles) WNW (286°) from SAN JUAN, Puerto Rico
Satellite map of the greater epicenter area

M 5.3      2011/05/21 13:08     Depth 45.1 km     LUZON, PHILIPPINES
09:08:06 PM at epicenter
Moderate to strong earthquake at an intermediate depth. The earthquake will have been felt as a light shaking by millions of people. We have given our Orange alert (cracks in walls are possible) because of the nearby towns of  Quezon, Delfin Albano, Tumauini. Quezon has a population of 22,500 people.
21 km (13 miles) NW (319°) from Ilagan, Luzon, Philippines
Satellite map of the greater epicenter area

M 5.0 5.2     2011/05/21 08:33     Depth 9.9 19 km     NORTHERN ALASKA, BERING STRAIT
12:33:21 AM at epicenter
UPDATE 11:01 UTC : Nome has reported a weak shaking (Nome is approx. 130 km from the epicenter). We expect that the people in Port Clarence will have experienced a VI to VII (strong to very strong shaking)
UPDATE 09:25 UTC : The epicenter, the magnitude and the depth have been recalculated as follows :
12 km (7 miles) N (351°) from Port Clarence, AK instead of 31 km. Depth : 19 km instead of 9.9 km
The population of Port Clarence was 21 at the 2000 census.
The changed parameters are making the Orange alert even stronger within a radius of 25 km from the epicenter.
Original message
Moderate but shallow earthquake 27 km (17 miles) from Brevig Mission, Alaska.
The population was 276 at the 2000 census.
31 km (19 miles) N (6°) from Port Clarence, AK
The Bering Strait, known to natives as Imakpik,Russia, the easternmost point of the Asian continent and Cape Prince of Wales, Alaska, USA, the westernmost point of the North American continent.
Satellite map of the greater epicenter area

M 4.6      2011/05/21 01:34     Depth 35.0 km      PERU-ECUADOR BORDER REGION
Friday, May 20, 2011 at 08:34:39 PM at epicenter
Moderate earthquake at the Pacific coastline. Harmless, but will have been felt by a lot of people in the area
17 km (10 miles) ENE of Tumbes, Peru and 45 km (27 miles) SW of Machala, Ecuador
Satellite map of the greater epicenter area

Daily summary of moderate quakes mainly felt by local animals
M 5.1      2011/05/21 00:41     Depth 40.7 km      SOUTH SANDWICH ISLANDS REGION
M 5.9      2011/05/21 00:16     Depth 64.8 km      SOUTH SANDWICH ISLANDS REGION
South Sandwich Islands are a number of wild volcanic uninhabited sub-Antarctic islands.
The only living creatures are penguins, petrels, etc (Antarctic birds)

Daily summary of earthquakes only surrounded by a lot of water
M 5.0      2011/05/21 16:30     Depth 9.9 km     NORTHERN MID-ATLANTIC RIDGE
M 4.5      2011/05/21 02:43     Depth 9.9 km      SOUTH OF PANAMA

Summary of very deep, deep moderate or weak quakes only faintly felt by people
M 4.9      2011/05/21 23:45     Depth 98.5 km     TARAPACA, CHILE
M 4.9      2011/05/21 14:23     Depth 23.5 km     KEPULAUAN BARAT DAYA, INDONESIA
M 5.0      2011/05/21 09:53     Depth 42.6 km      EASTERN NEW GUINEA REG, PAPUA NEW GUINEA
M 4.9      2011/05/21 06:31     Depth 523.6 km      SOUTH OF THE FIJI ISLANDS
M 4.8      2011/05/21 04:35     Depth 41.7 km      SOLOMON ISLANDS

Japan, Honshu : aftershocks of M4.5 or greater
M 5.8      2011/05/21 22:06     Depth 34.5 km     NEAR THE EAST COAST OF HONSHU, JAPAN
JMA Intensity 4  @ Ibaraki-ken Hokubu, Ibaraki-ken Nambu, Chiba-ken Hokutobu and Chiba-ken Hokuseibu
M 4.6      2011/05/21 10:24     Depth 35.3 km     NEAR THE EAST COAST OF HONSHU, JAPAN
M 4.8      2011/05/21 08:51     Depth 67.3 km      NEAR THE EAST COAST OF HONSHU, JAPAN
M 4.6      2011/05/21 05:35     Depth 35.3 km      NEAR THE EAST COAST OF HONSHU, JAPAN

Earthquakes occurred yesterday (UTC time), but today local time

M 4.6      2011/05/20 20:03     Depth 12.0 km     WESTERN AUSTRALIA
21/05 – 04:03:27 AM at epicenter
Epicenter in the Australian outback and in the greater Karijini National Park area.
Shallow earthquake which will have been well felt in Newman, Juna Downs, Wittenoom, Mount Sheila, Tom Price, Rocklea, Paraburdoo and Karijini.
The Hickman Crater is 35 km to the north.
42 km (26 miles) W of Newman, Western Australia, Australia. Newman is a small city with 4,245 inhabitants.
Newman is a modern mining town, which implicates that this earthquake has not necessarily a tectonic origin.
Satellite map of the greater epicenter area

M 5.8      2011/05/20 19:43    Depth 1.0 km     EASTERN NEW GUINEA REG, PAPUA NEW GUINEA
21/05 – 05:43:15 AM at epicenter
Please read our in-depth report about this earthquake - Click here
54 km (33 miles) SSW of Lae, New Guinea, PNG
Satellite map of the greater epicenter area

seismograph - recordingUseful information to read this daily earthquake list
This earthquake list covers important earthquakes in the world.
If a more detailed page is present, the earthquake line will be linked to the detailed page.
For your comfort, we will provide in most cases Google Satellite Map links to give you an idea where the earthquake struck, which terrain it happened and if villages or cities are located in the immediate vicinity. The reference for the time zone is UTC (Coordinated Universal Time, also called GMT)
The page is regularly updated to add new earthquakes.
green color = NOT dangerous for damage or injuries
orange color = MODERATE risk for damage or injuries
red color = CONSIDERABLE risk for damage or injuries

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People :
Felt by persons at rest, on upper floors or favorably placed.
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People :
Felt indoors; hanging objects may swing, vibration similar to passing of light trucks, duration may be estimated, may not be recognized as an earthquake.
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People :
Generally noticed indoors but not outside. Light sleepers may be awakened. Vibration may be likened to the passing of heavy traffic, or to the jolt of a heavy object falling or striking the building.
Fittings :
Doors and windows rattle. Glassware and crockery rattle. Liquids in open vessels may be slightly disturbed. Standing motorcars may rock.
Structures :
Walls and frames of buildings, and partitions and suspended ceilings in commercial buildings, may be heard to creak.
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People :
Generally felt outside, and by almost everyone indoors. Most sleepers awakened. A few people alarmed.
Fittings :
Small unstable objects are displaced or upset. Some glassware and crockery may be broken. Hanging pictures knock against the wall. Open doors may swing. Cupboard doors secured by magnetic catches may open. Pendulum clocks stop, start, or change rate.
Structures :
Some large display windows cracked. A few earthenware toilet fixtures cracked.
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People Felt by all. People and animals alarmed. Many run outside. Difficulty experienced in walking steadily.
Fittings :
Objects fall from shelves. Pictures fall from walls. Some furniture moved on smooth floors, some unsecured free-standing fireplaces moved. Glassware and crockery broken. Very unstable furniture overturned. Small church and school bells ring. Appliances move on bench or table tops. Filing cabinets or "easy glide" drawers may open (or shut).
Structures :
Slight damage to buildings with low standard. Some stucco or cement plaster falls. Large display windows broken. Damage to a few weak domestic chimneys, some may fall.
Environment :
Trees and bushes shake, or are heard to rustle. Loose material may be dislodged from sloping ground, e.g. existing slides, talus slopes, shingle slides.
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People
General alarm. Difficulty experienced in standing. Noticed by motorcar drivers who may stop.
Fittings :
Large bells ring. Furniture moves on smooth floors, may move on carpeted floors. Substantial damage to fragile contents of buildings.
Structures :
Unreinforced stone and brick walls cracked. Low standard buildings cracked with some minor masonry falls. A few instances of damage to buildings of ordinary workmanship. Unbraced parapets, unbraced brick gables, and architectural ornaments fall. Roofing tiles, especially ridge tiles may be dislodged. Many unreinforced domestic chimneys damaged, often falling from roof-line. Water tanks Type I burst. A few instances of damage to brick veneers and plaster or cement-based linings. Unrestrained water cylinders (hot-water cylinders) may move and leak. Some common windows cracked. Suspended ceilings damaged.
Environment :
Water made turbid by stirred up mud. Small slides such as falls of sand and gravel banks, and small rock-falls from steep slopes and cuttings. Instances of settlement of unconsolidated or wet, or weak soils. Some fine cracks appear in sloping ground. A few instances of liquefaction (i.e. small water and sand ejections).
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People Alarm may approach panic. Steering of motorcars greatly affected. Structures : Low standard buildings heavily damaged, some collapse. ordinary workmanship buildings damaged, some with partial collapse. Reinforced masonry or concrete buildings damaged in some cases. A few instances of damage to buildings and bridges designed and built to resist earthquakes. Monuments and pre-1976 elevated tanks and factory stacks twisted or brought down. Some pre-1965 infill masonry panels damaged. A few post-1980 brick veneers damaged. Decayed timber piles of houses damaged. Houses not secured to foundations may move. Most unreinforced domestic chimneys damaged, some below roof-line, many brought down. Environment : Cracks appear on steep slopes and in wet ground. Small to moderate slides in roadside cuttings and unsupported excavations. Small water and sand ejections and localized lateral spreading adjacent to streams, canals, lakes, etc.
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Structures Many low standard buildings destroyed. Ordinary workmanship buildings heavily damaged, some collapse. Reinforced masonry or concrete buildings damaged, some with partial collapse. Buildings and bridges designed and built to resist earthquakes damaged in some cases, some with flexible frames seriously damaged. Damage or permanent distortion to some buildings and bridges, designed and built to normal use standards. Houses not secured to foundations shifted off. Brick veneers fall and expose frames. Environment : Cracking of ground conspicuous. Landsliding general on steep slopes. Liquefaction effects intensified and more widespread, with large lateral spreading and flow sliding adjacent to streams, canals, lakes, etc.
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