M 5.2 - 169 km ENE of Angoram, Papua New Guinea

 M 5.2 - 169 km ENE of Angoram, Papua New Guinea

2022-10-27 15:57:23 (UTC)3.431°S 145.458°E10.0 km profundity

Close by Spots

Angoram, East Sepik, Papua New Guinea

169.8 km (105.5 mi) WSWPopulation: 1604

Madang, Madang, Papua New Guinea

202.6 km (125.9 mi) SPopulation: 27419

Wewak, East Sepik, Papua New Guinea

203.3 km (126.3 mi) WPopulation: 18230

Goroka, Eastern High countries, Papua New Guinea

295.5 km (183.6 mi) SPopulation: 18503

Mount Hagen, Western High countries, Papua New Guinea

302.5 km (187.9 mi) SSWPopulation: 33623

Structural Rundown

Seismotectonics of the New Guinea Locale and Area

The Australia-Pacific plate limit is more than 4000 km long on the northern edge, from the Sunda (Java) channel in the west to the Solomon Islands in the east. The eastern area is more than 2300 km long, expanding west from upper east of the Australian mainland and the Coral Ocean until it meets the east shoreline of Papua New Guinea. The limit is overwhelmed by the overall toward the north subduction of the Australia plate.

Along the South Solomon channel, the Australia plate combines with the Pacific plate at a pace of roughly 95 mm/yr towards the east-upper east. Seismicity along the channel is predominantly connected with subduction tectonics and huge quakes are normal: there have been 13 M7.5+ tremors recorded starting around 1900. On April 1, 2007, a M8.1 interplate megathrust quake happened at the western finish of the channel, creating a wave and killing no less than 40 individuals. This was the third M8.1 megathrust occasion related with this subduction zone in the previous 100 years; the other two happened in 1939 and 1977.

Further east at the New England channel, the overall movements of a few microplates encompassing the Australia-Pacific limit, including north-south situated ocean bottom spreading in the Woodlark Bowl south of the Solomon Islands, keep up with the overall toward the north subduction of Australia-partnered lithosphere underneath Pacific-subsidiary lithosphere. The vast majority of the huge and extraordinary tremors east of New Guinea are connected with this subduction; such quakes are especially amassed at the cusp of the channel south of New Ireland. 33 M7.5+ seismic tremors have been recorded beginning around 1900, remembering three shallow push shortcoming M8.1 occasions for 1906, 1919, and 2007.

The western finish of the Australia-Pacific plate limit is maybe the most complicated part of this limit, broadening 2000 km from Indonesia and the Banda Ocean to eastern New Guinea. The limit is overwhelmingly joined along a bend landmass crash fragment crossing the width of New Guinea, however the areas close to the edges of the impinging Australia mainland edge additionally incorporate moderately short portions of extensional, strike-slip and united twisting. The prevailing intermingling is obliged by shortening and elevate across a 250-350 expansive band of northern New Guinea, as well as by sluggish toward the south coming close to subduction of the Pacific plate north of New Guinea at the New Guinea channel. Here, the Australia-Pacific plate relative speed is roughly 110 mm/yr towards the upper east, prompting the 2-8 mm/yr inspire of the New Guinea Good countries.

While the northern band of twisting is moderately diffuse east of the Indonesia-Papua New Guinea line, in western New Guinea there are something like two little (<100,000 km²) blocks of somewhat undeformed lithosphere. The westernmost of these is the Birds Head Promontory microplate in Indonesia's West Papua area, limited on the south by the Seram channel. The Seram channel was initially deciphered as an outrageous curve in the Sunda subduction zone, however is presently remembered to address a toward the south coming close to subduction zone between Birds Head and the Banda Ocean.

There have been 22 M7.5+ quakes kept in the New Guinea district starting around 1900. The predominant tremor components are pushed and strike slip, related with the bend mainland crash and the overall movements between various neighborhood microplates. The biggest seismic tremor in the locale was a M8.2 shallow pushed issue occasion in the northern Papua region of Indonesia that killed 166 individuals in 1996.

The western part of the northern Australia plate limit expands around 4800 km from New Guinea to Sumatra and essentially isolates Australia from the Eurasia plate, including the Sunda block. This part is predominantly concurrent and incorporates subduction at the Sunda (Java) channel, and a youthful curve landmass impact.

In the east, this limit reaches out from the Kai Islands to Sumba along the Timor box, offset from the Sunda channel by 250 km south of Sumba. In opposition to prior structural models in which this box was deciphered as a subduction highlight ceaseless with the Sunda subduction zone, it is currently remembered to address a dying down deformational component connected with the impact of the Australia plate mainland edge and the volcanic circular segment of the Eurasia plate, starting in the last 5-8 Myr. Before impact started, the Sunda subduction zone stretched out toward the east to basically the Kai Islands, confirmed by the presence of a toward the north plunging zone of seismicity underneath Timor Leste. A more point by point assessment of the seismic zone along it's eastern section uncovers a hole in middle of the road profundity seismicity under Timor and seismic components that show a toward the east engendering tear in the plunging chunk as the adversely light maritime lithosphere confines from emphatically light mainland lithosphere. By all accounts, GPS estimations demonstrate that the district around Timor is as of now as of now not associated with the Eurasia plate, however rather is moving at almost a similar speed as the Australia plate, one more result of impact.

Enormous seismic tremors in eastern Indonesia happen much of the time however interplate megathrust occasions connected with subduction are uncommon; this is logical because of the separation of the plunging maritime chunk from the mainland edge. There have been 9 M7.5+ seismic tremors recorded from the Kai Islands to Sumba starting around 1900. The biggest was the incomparable Banda Ocean seismic tremor of 1938 (M8.5) a middle of the road profundity push blaming occasion that didn't cause huge death toll.