Light mag. 3.5 earthquake - Sulu Sea, 45 km northwest of Isabela, Philippines, on 21 April 2021 - 02:18 PM (PST) -

Light mag. 3.5 earthquake - Sulu Sea, 45 km northwest of Isabela, Philippines, on 21 April 2021 - 02:18 PM (PST)

Light magnitude 3.5 earthquake at 6 km depth

21 Apr 06:24 UTC: First to report: PHIVOLCS after 7 minutes.
21 Apr 06:46: Now using data updates from PHIVOLCS
22 Apr 07:00: Magnitude recalculated from 3.2 to 3.5. Hypocenter depth recalculated from 2.0 to 6.0 km (from 1.2 to 3.7 mi). Epicenter location corrected by 14 km (8.6 mi) towards ENE.
Date & time: 21 Apr 2021 06:18:00 UTC -
Local time at epicenter: 21 April 2021 - 02:18 PM (PST)
Magnitude: 3.5
Depth: 6.0 km
Epicenter latitude / longitude: 6.89°N / 121.61°E (Sulu Sea, Zamboanga Peninsula, Philippines)
Nearest volcano: Jolo (152 km / 94 mi)
Nearby towns and cities:
37 km (23 mi) WSW of Talisayan (Zamboanga del Sur) (pop: 5,450) --> See nearby quakes!
38 km (23 mi) NW of Tairan Camp (Autonomous Region in Muslim Mindanao) (pop: 2,770) --> See nearby quakes!
40 km (25 mi) W of Recodo (pop: 42,800) --> See nearby quakes!
40 km (25 mi) SW of Labuan (Zamboanga del Sur) (pop: 12,900) --> See nearby quakes!
45 km (28 mi) WNW of Isabela (Autonomous Region in Muslim Mindanao) (pop: 67,300) --> See nearby quakes!
48 km (30 mi) NW of Maluso (Basilan, Autonomous Region in Muslim Mindanao) (pop: 31,400) --> See nearby quakes!
51 km (32 mi) W of Zamboanga City (pop: 457,600) --> See nearby quakes!
68 km (42 mi) WSW of Sangali (Zamboanga del Sur) (pop: 14,700) --> See nearby quakes!
115 km (71 mi) NE of Jolo (Autonomous Region in Muslim Mindanao) (pop: 101,000) --> See nearby quakes!
861 km (535 mi) S of Manila (National Capital Region) (pop: 1,600,000) --> See nearby quakes!
112 km (70 mi) NNE of Jolo Island (pop: 530,000) --> See nearby quakes!
Primary data source: PHIVOLCS (Philippine Institute of Volcanology and Seismology)
Estimated released energy: 1.1 x 1010 joules (3.12 megawatt hours, equivalent to 2.68 tons of TNT) More info
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
3.56 km026 Km N 04° E of Hadji Muhtamad (Basilan), PhilippinesPHIVOLCS
unknownn/aNear Zamboanga City, Zamboanga Peninsula, PhilippinesVolcanoDiscovery

User reports for this quake (14)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Sinunuc, zamboanga City / Very weak shaking (MMI II) / single vertical bump / very short : i am seated in our sala set while watc hing television, i felt very slow vertical bump of the chair where i am seated. My son also felt inside his room, and rush outside and said ma its earthquack. | 4 users found this interesting.  
Zamboanga city / Moderate shaking (MMI V) / rattling, vibrating / 30-60 s : The water is shaking vigorously and the earthquake has sound effects | One user found this interesting.  
Tala Lumbangan Zone 4 Zamboanga City / Light shaking (MMI IV) / vertical swinging (up and down) / 2-5 s : My water spill 1/4 of it, I was eating during that time. When I felt that it was an earthquake I go down at the table and put my hands on my head.  
recodo zamboanga city / Weak shaking (MMI III) / 2-5 s
Lamitan City (58.8 km ESE of epicenter) [Map] / Weak shaking (MMI III) / 1-2 s
Zamboanga / Very weak shaking (MMI II) / 1-2 s
Isabela basilan / Weak shaking (MMI III) / rattling, vibrating / 2-5 s
tumaga, zamboanga city / Weak shaking (MMI III) / complex motion difficult to describe / 20-30 s
Zamboanga city / Light shaking (MMI IV) / horizontal (sideways) swinging / 1-2 s
Zamboanga City / Very weak shaking (MMI II) / very short
Lamitan City / Very weak shaking (MMI II)
Zamboanga City / Weak shaking (MMI III) / single lateral shake / 5-10 s
Baliwasan, Zamboanga City / Weak shaking (MMI III) / horizontal (sideways) swinging / 10-15 s
zamboanga city (51.4 km E of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 5-10 s : felt my bed move  
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