Just hours after the Colorado earthquake, another temblor struck a US state Tuesday, the US Geological Survey (USGS) reported.

According to its bulletin, the quake measured a Richter Scale reading of magnitude 5.8 (earlier reported to be 5.9) and had an epicenter located 14 km (9 miles) South Southwest of Mineral, Virgina at 17:51:04 UTC at a depth of 6 km (3.7 miles).

The intraplate earthquake reportedly was the strongest in Virginia's recorded history since 1897. It was felt as far away as Ontario, Canada; Michigan; Pennsylvania; Ohio; South Carolina; North Carolina; New York and Massachusetts. Many buildings were evacuated in New York and Philadelphia including the Capitol building and the Pentagon in Washington, DC.

There are also reports that it damaged the Pentagon, Washington National Cathedral and the Ronald Reagan Washington National Airport.

A couple of airports were temporarily closed and two nuclear plants in Virginia were taken offline because of the quake.

There were no reports of casualties.

A magnitude 5.4 earthquake has struck northern Luzon Thursday morning, the Philippine Institute of Volcanology and Seismology (Phivolcs) reported.

The tectonic quake hit its epicenter, 37 km Southwest of Calayan, Cagayan, at 10:59 a.m. It has a depth of 16 km and was felt at the following intensities in the following areas:



Intensity IV - Calayan, Cagayan

Intensity III - Sanchez Mira, Cagayan

Intensity II - Pasuquin and Laoag, Ilocos Norte



The Philvolcs said it is expecting aftershocks from the temblor.



There have been no initial reports of damage from the quake.

Earthquake in the Philippines, July 26, 2011: 5.9-magnitude quake jolts Luzon

An earthquake has struck Luzon, Philippines, early morning on Tuesday. According to the Philippine Institute of Volcanology and Seismology (Phivolcs), the magnitude 5.9 (first reported to be 6.2) temblor was recorded off 35km Southwest of Iba, Zambales at 1:15 a.m. and was felt in other areas in Luzon including in the Philippine capital, Manila.

The tectonic quake has a depth of 30km and was felt in the following areas at the following intensities:

Intensity IV - Clark, Pampanga; Obando, Bulacan; Quezon City; Manila; Alabang, Muntinlupa; and Bacoor, Cavite

Intensity III - Makati; Pasig; Taguig; Mandaluyong; Tagaytay; and Cabanatuan City, Nueva Ecija

Intensity II - Baguio City

There were no initial reports of injuries or damage to property.

Meanwhile, three (3) aftershocks were recorded within 3 hours after the first quake hit. The largest was a 4.0-magnitude which occurred at 3:10 a.m. The other two measured Richter Scale readings of 3.9 and 2.8 which hit Iba, Zambales at 2:12 a.m. and 3:34 a.m respectively.

The Philippines lies on the Pacific Ring of Fire where earthquakes often occur.

Here are Philvolcs descriptions of the Earthquake Intesities above:

Intensity II (Slightly Felt) - Felt by few individuals at rest indoors. Hanging objects swing slightly. Still Water in containers oscillates noticeably.

Intensity III (Weak) - Felt by many people indoors especially in upper floors of buildings. Vibration is felt like one passing of a light truck. Dizziness and nausea are experienced by some people. Hanging objects swing moderately. Still water in containers oscillates moderately.

Intensity IV (Moderately Strong) - Felt generally by people indoors and by some people outdoors. Light sleepers are awakened. Vibration is felt like a passing of heavy truck. Hanging objects swing considerably. Dinner, plates, glasses, windows and doors rattle. Floors and walls of wood framed buildings creak. Standing motor cars may rock slightly. Liquids in containers are slightly disturbed. Water in containers oscillate strongly. Rumbling sound may sometimes be heard.

Negros Occidental has been struck by an earthquake anew on July 14. According to the Philippine Volcanology and Seismology (Phivolcs), a magnitude 3.9 temblor was recorded off 42km Southeast of Sipalay City at 7:19 in the morning.

The quake, which was tectonic in origin and was 1km deep, was felt at Intensity 1 at Sipalay City, Negros Occidental.

There have been no reports of damage from this quake.

Since July 11, more than 20 quakes had struck Negros with the strongest recorded at 4:47 a.m. on July 12 which measured 6.2 magnitude on the Richter Scale.

The Philippines sits on the Pacific Ring of Fire where earthquakes frequently occur.

The newest temblor struck Mamburao, Occidental Mindoro at 12:42 a.m. on May 23. It was of tectonic origin and has an intermediate depth of 106 kilometers, according to the Philippine Institute of Volcanology and Seismology's (Phivolcs) latest earthquake bulletin.

The quake was reported at the following intensities in the following areas:

Intensity IV - Ilijan, Batangas
Intensity III - Tagaytay City; Malate, Manila; Pto. Galera;
Alabang, Muntinlupa; Clark,Pampanga
Intensity II - Malolos, Bulacan
Intensity I - Nichols, Pasay

The above intensities are defined by the Philvolcs as:

Intensity I (Scarcely Perceptible) - Perceptible to people under favorable circumstances. Delicately balanced objects are disturbed slightly. Still Water in containers oscillates slowly.

Intensity II (Slightly Felt) - Felt by few individuals at rest indoors. Hanging objects swing slightly. Still Water in containers oscillates noticeably.

Intensity III (Weak) - Felt by many people indoors especially in upper floors of buildings. Vibration is felt like one passing of a light truck. Dizziness and nausea are experienced by some people. Hanging objects swing moderately. Still water in containers oscillates moderately.

Intensity IV (Moderately Strong) - Felt generally by people indoors and by some people outdoors. Light sleepers are awakened. Vibration is felt like a passing of heavy truck. Hanging objects swing considerably. Dinner, plates, glasses, windows and doors rattle. Floors and walls of wood framed buildings creak. Standing motor cars may rock slightly. Liquids in containers are slightly disturbed. Water in containers oscillate strongly. Rumbling sound may sometimes be heard.

There have been no immediate reports of damage from the quake.

The Philippines sits on the Pacific Ring of Fire where volcanic and seismic activities are more frequent than in most areas of the world.

Earthquake in the Philippines on May 21, 2011 Update

An earthquake of 5.5 magnitude struck the northern Philippine province of Isabela at 9:08 p.m. on May 21st which was followed by 8 more earthquakes or aftershocks within 12 hours after the first quake. This is according to the Philippine Institute Volcanology and Seismology's (Phivolcs) earthquake bulletin.

The initial quake was felt at the following intensities in the following areas:

Intensity V - Ilagan, Isabela
Intensity IV- Tuguegarao City, Cagayan; Penablanca, Cagayan; Quirino Province; Tumawini, Isabela; Baler, Aurora
Intensity II - Baguio City; Tabuk, Kalinga

All the temblors were of tectonic origin with Ilagan, Isabela as a common epicenter.

Here are the time and magnitude of each aftershock:

21 May 2011 - 10:12 PM, Magnitude 3.4
21 May 2011 - 10:20 PM, Magnitude 2.4
22 May 2011 - 12:19 AM, Magnitude 2.1
22 May 2011 - 12:52 AM, Magnitude 2.3
22 May 2011 - 01:44 AM, Magnitude 3.3
22 May 2011 - 02:19 AM, Magnitude 2.3
22 May 2011 - 03:48 AM, Magnitude 2.6
22 May 2011 - 09:25 AM, Magnitude 2.4

Six more quakes jolted other Philippine provinces on May 21st.

There have been no reports of damage from the quakes as of present time.

Multiple earthquakes in one day is not unusual in the Philippines since it lies on the Pacific Ring of Fire where volcanic and seismic activities are more frequent.