Current Philippine tremors (not dangerous); Alert Level 1 on Taal and Mayon (abnormal; hazardous eruption not imminent)

Malindig Volcano in Buenavista, Marinduque.
On Nov. 30, 2013 at 8:35 pm at 13.24(N) and 121.87(E) at depth of 001 km, 3.1 M was felt  S 75° W of Buenavista  (Marinduque)

Philippine Standard Time (PST)  is eight hours ahead of Coordinated Universal Time (UTC). (PST = UTC + 8H) UTC is the time standard for which the world regulates clocks and time.

Earthquakes in this list with their date and time underlined in blue have reported felt intensities. Intensity ratings are based on the PHIVOLCS Earthquake Intensity Scale

Date - Time                      Latitude  Longitude   Depth  Magnitude      Location
(Philippine Time)                (ºN)         (ºE)           (km)

03 Dec 2013 - 11:36 PM          04.88      126.11        039     4.5       093 km S 49° E of Sarangani (Davao Del Sur)

03 Dec 2013 - 12:24 PM          09.69      123.68        062     3.7       020 km N 75° W of Tagbilaran City

03 Dec 2013 - 10:41 AM          09.91      124.04        016     3.3       036 km N 35° E of Tagbilaran City
03 Dec 2013 - 03:08 AM          13.70      120.60        033     3.2       015 km S 13° W of Calatagan (Batangas)

03 Dec 2013 - 03:04 AM          08.86      125.66        020     2.6       006 km N 47° W of Sibagat (Agusan Del Sur)

02 Dec 2013 - 09:53 AM          17.73      120.84        033     2.7       030 km N 58° E of Bangued (Abra)

02 Dec 2013 - 05:07 AM          16.54      120.75        002     3.4       009 km N 24° E of Bokod (Benguet)

01 Dec 2013 - 01:08 PM          06.31      126.30        033     2.8       044 km S 33° E of Governor Generoso (Davao Oriental)

01 Dec 2013 - 03:47 AM          19.54      121.53        023     3.3       029 km N 15° E of Calayan (Cagayan)

01 Dec 2013 - 02:48 AM          15.90      119.63        022     3.7       029 km S 69° W of Dasol (Pangasinan)

30 Nov 2013 - 08:44PM           09.85      124.01        003      3.6       028 km N 36° E of  Tagbilaran City
30 Nov 2013 - 08:35 PM          13.24      121.87        001      3.1       008 km S 75° W of Buenavista  (Marinduque)
30 Nov 2013 - 07:36 PM          09.73      123.61        001      3.7       028 km N 70° W of Tagbilaran City
30 Nov 2013 - 04:51 PM          13.84      119.64        027      3.3       053 km S 88° W of Lubang (Occidental Mindoro)

Taal Volcano's crater before the 1911 eruption with the central cone and one of the lakes on the crater floor. Wikipedia

TAAL VOLCANO BULLETIN 04 December 2013 8:00 A.M.

Taal Volcano’s (14.0000°N, 120.9833°E) seismic network recorded three (3) volcanic earthquakes during the past 24-hour observation period. Field measurements on 28 November 2013 at the eastern sector of the Main Crater Lake yielded a slight decrease in water temperature of 32.2°C from 32.3°C, a decrease in water level of 1.39 meter from 1.49 meter, and increase in water acidity of pH 2.83 from pH 2.85. Ground deformation survey in the Volcano Island on 4-12 September 2013 yielded slight deflation at Calauit, Alas-as, Pira-piraso, Daang Kastila and New Eruption Site precise leveling lines compared to the May 2013 survey. GPS data from July 2013 to second week of October 2013 showed slight deflationary changes in ground deformation. However, the edifice is still slightly inflated in general compared to February 2011 baseline data. Carbon dioxide (CO2) emission at the Main Crater Lake increased to 1700 tonnes per day on 06 July 2013 compared to 947 tonnes per day last 03 March 2013. Alert Level 1 remains in effect over Taal Volcano. This means that hazardous eruption is not imminent. The public, however, is reminded that the Main Crater should be strictly off-limits because sudden steam explosions may occur and high concentrations of toxic gases may accumulate. The northern portion of the Main Crater rim, in the vicinity of Daang Kastila Trail, may also become hazardous when steam emission along existing fissures suddenly increases.·Furthermore, the public is also reminded that the entire Volcano Island is a Permanent Danger Zone (PDZ), and permanent settlement in the island is strongly not recommended. DOST-PHIVOLCS MAYON VOLCANO BULLETIN 04 December 2013 8:00 A.M. Mayon Volcano’s (13.2500°N, 123.6833°E) seismic network recorded three (3) rockfall-related events during the past 24-hour observation period. Moderate emission of white steam plumes was observed that drifted to the northwest, west-southwest, and southwest directions. No crater glow was observed last night. Sulfur dioxide (SO2) emission on 23 November 2013 was measured at an average of 211 tonnes/day. Ground deformation survey (precise leveling) on the 2nd week of November 2013 showed slight deflation of the edifice compared to August 2013 survey, with the volcano still slightly inflated compared to January 2010 baselines. Mayon Volcano’s alert status remains at Alert Level 1, which means that it is at abnormal condition.· Although this means that presently no magmatic eruption is imminent, it is strongly advised that the public refrain from entering the 6-kilometer radius Permanent Danger Zone (PDZ) due to the perennial life-threatening dangers of rockfalls, landslides/avalanches at the middle to upper slope, sudden ash puffs and steam-driven or phreatic eruptions from the summit. Active stream/river channels and those identified as perennially lahar-prone areas on all sectors of the volcano should also be avoided especially during extreme weather conditions when there is heavy and prolonged rainfall. DOST-PHIVOLCS maintains its close monitoring of Mayon Volcano and any new development will be communicated to all concerned stakeholders. DOST-PHIVOLCS Related articles:  Marinduque earthquake swarms rising They are earthquake swarms - Solidum on Marinduque tremors Magnitude 4.6 earthquake between Mindoro and Marinduque today Oct 13 Marinduque earthquakes could have triggered to free Bohol energy but - Earthquake-Report