earth science

Sorong Fault

Sorong Fault is a earth science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Sorong Fault rather than just read about it. In short: Sorong fault also (Sorong Fault Zone, SFZ) is an active, broad zone of inferred left lateral shear at the triple junction of the Australian plate, Eurasian plate, and Pacific plate, where many plate fragments exist, such as the Philippine Sea plate, Bird's Head plate, Halmahera plate and the Molucca Sea plate. It has been implicated in numerous large earthquakes.

Key takeaways

Sorong Fault belongs to earth science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Sorong Fault to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Sorong Fault from memory before moving on to harder problems.

Reference excerpt

Sorong fault also (Sorong Fault Zone, SFZ) is an active, broad zone of inferred left lateral shear at the triple junction of the Australian plate, Eurasian plate, and Pacific plate, where many plate fragments exist, such as the Philippine Sea plate, Bird's Head plate, Halmahera plate and the Molucca Sea plate. It has been implicated in numerous large earthquakes. It is one of the two major faults created by the Australian and Pacific plate convergence, the other being the Ramu-Markham Fault zone. The fault triggered the destructive 1998 North Maluku earthquake which killed 41 people.

Location The Sorong fault begins around Sulawesi and runs towards New Guinea. It marks the boundary between Halmahera plate and Bird's Head plate. The Sorong fault system has been documented to extend westward more than 500 miles (800 km) from Teluk Sarera to Kepulauan Banggai.

Geology The fault zone juxtaposes Mesozoic-Tertiary continental and volcanic arc/ophiolitic rocks.

Plate evolution It is widely believed that fragments of the northern Australian continental margin in New Guinea are being detached and translated westward in this shear zone until they collide with the eastern margin of Eurasia (Sundaland) in the region of Sulawesi Island. However, the details of terrane translation, amalgamation, and docking remain poorly documented at this time. In particular, the timing of events is very poorly constrained, with estimates for the commencement of the SFZ ranging from early Miocene or older to Pleistocene. Investigations in the 1990s of the SFZ and the adjacent regions of Sulawesi and Irian Jaya (Indonesian New Guinea), including fieldwork in several of the SFZ island-terranes (Waigeo Island, Halmahera, Bacan, Obi Islands, and Sula Islands), suggest a less mobilist interpretation of the region than previous reconstructions. SFZ did not begin to develop in its present form before the late Miocene.

See also List of earthquakes in Indonesia

References

Worked examples

Example 1 — a first encounter with Sorong Fault

Start with the simplest possible case. Write down what Sorong Fault claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Sorong Fault before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Sorong Fault ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Sorong Fault

In research: Sorong Fault appears in earth science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Sorong Fault in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Sorong Fault is common in secondary-school and first-year university syllabi. It links to neighbouring topics Geology of the Pacific Ocean, Plate tectonics, Seismic faults of Indonesia, so understanding it makes those chapters shorter.
In everyday life: Look for Sorong Fault outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Sorong Fault in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sorong Fault means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Sorong Fault out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sorong Fault in simple terms?

Why does Sorong Fault matter?

Because it connects several earth science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Sorong Fault?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Sorong Fault.