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Buried rupture earthquake

In seismology, a buried rupture earthquake, or blind earthquake, is an earthquake which does not produce a visible offset in the ground along the fault (as opposed to a surface rupture earthquake, which does).

Version
v1 · 2026-09-28 · History
Domain-specific #
8293
Domain group
Natural Sciences
Origin domain
Geology & Earth Sciences
Subdomain
Seismology → Geology & Earth Sciences

Core Idea

Buried rupture earthquake is treated here as the recurring seismology identity summarized by this source-grounded definition: In seismology, a buried rupture earthquake, or blind earthquake, is an earthquake which does not produce a visible offset in the ground along the fault (as opposed to a surface rupture earthquake, which does). In seismology, a buried rupture earthquake, or blind earthquake, is an earthquake which does not produce a visible offset in the ground along the fault (as opposed to a surface rupture earthquake, which does).

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The Hidden-Crack Earthquake

When an earthquake happens, rock deep underground cracks and slips. Sometimes the crack reaches all the way up and you can see the ground broken and shifted in a line. In a buried rupture earthquake, the crack stays hidden underground, so the ground surface does not show a break along the fault, even though the shaking can still be strong.

The Earthquake With No Ground Crack

Earthquakes happen when rocks slip along a crack in the Earth called a fault. In some earthquakes the slipping reaches the surface, leaving a visible step or offset in the ground. A buried rupture earthquake, also called a blind earthquake, is one where the slip stays underground and does not make a visible offset along the fault. When the fault is a kind called a thrust fault, it is called a blind thrust earthquake. Buried rupture earthquakes can still shake the ground hard; in fact, recorded shaking from them has been stronger than from large surface-rupture earthquakes.

Blind Fault Rupture Earthquake

In seismology, a buried rupture earthquake, or blind earthquake, is an earthquake whose fault rupture does not produce a visible offset at the ground surface along the fault. This is in contrast to a surface rupture earthquake, where the fault slip breaks through to the surface. If the fault is a thrust fault, the event is called a blind thrust earthquake. The lack of a surface break does not make these earthquakes gentle: recorded ground motions from large surface-rupture earthquakes have been weaker than those from buried rupture earthquakes. Examples include the Loma Prieta, Northridge and Noto Hanto earthquakes. Under the sea, when the rupture is buried, water uplifted outside the fault plane can produce large tsunami waves compared with the case where the rupture breaks the seabed.

 

A buried rupture earthquake, or blind earthquake, is an earthquake whose rupture does not produce a visible offset in the ground along the fault, in contrast to a surface rupture earthquake, which does. When the causative fault is a thrust fault, the event is termed a blind thrust earthquake. Seismologically, the distinction matters for ground motion: recorded ground motions of large surface-rupture earthquakes are weaker than those of buried rupture earthquakes, with the main slip patch (asperity) of buried events located at greater depth. Well-known examples include the Loma Prieta, Northridge, and Noto Hanto earthquakes. For offshore events, a buried rupture, compared with a seabed surface rupture, uplifts water outside the fault plane, which can generate large tsunami waves. The identifying criterion is the absence of a visible surface offset along the fault; having a well-known example or strong shaking alone does not establish that an event was a buried rupture.

Scope of Application

  • Ground motion. Recorded ground motions of large surface-rupture earthquakes are weaker than the ground motions from buried rupture earthquakes.

  • Depth. The asperity for a buried rupture earthquakes is in area deeper than roughly.

  • Depth. Examples are the Loma Prieta earthquake, Northridge earthquake, and the Noto Hanto earthquake.

  • Tsunamis. As compared to the seabed surface rupture case, uplifted water outside the fault plane in buried rupture earthquakes makes for large tsunami waves.

  • Documented setting. In seismology, a buried rupture earthquake, or blind earthquake, is an earthquake which does not produce a visible offset in the ground along the fault (as opposed to a surface rupture.

Clarity

A clear use of Buried rupture earthquake names the carrier, the operative relation, and the conditions under which the source treats the identity as present. The minimal definition is In seismology, a buried rupture earthquake, or blind earthquake, is an earthquake which does not produce a visible offset in the ground along the fault (as opposed to a surface rupture earthquake, which does).

Manages Complexity

Buried rupture earthquake compresses multiple seismology details into a stable diagnostic relation. The source shows both the central mechanism—the asperity for a buried rupture earthquakes is in area deeper than roughly .—and the practical consequence—when the fault in question is a thrust fault, the earthquake is known as a blind thrust earthquake. This compression makes cases comparable while leaving parameters, conventions, exceptions, and evidential quality explicit.

Abstract Reasoning

  1. Type the carrier. Identify the seismology entities to which the claim applies.
  2. State the relation. Use the source-grounded identity: In seismology, a buried rupture earthquake, or blind earthquake, is an earthquake which does not produce a visible offset in the ground along the fault (as opposed to a surface rupture earthquake, which does).
  3. Check operation and conditions. Examples are the Loma Prieta earthquake, Northridge earthquake, and the Noto Hanto earthquake.
  4. Demand recognition evidence.

Knowledge Transfer

Within the home domain. Knowledge about Buried rupture earthquake transfers literally when a new case preserves the same carrier type, relation, and recognition test. Recorded ground motions of large surface-rupture earthquakes are weaker than the ground motions from buried rupture earthquakes. The asperity for a buried rupture earthquakes is in area deeper than roughly. Beyond the home domain. No canonical parent is asserted for Buried rupture earthquake. An outside case receives the specialist name only when the same typed roles and rejection conditions can be filled literally; otherwise the comparison remains an analogy pending later graph densification.

Neighborhood in Abstraction Space

Buried rupture earthquake sits in a sparse region of the domain-specific corpus (76th percentile for distinctiveness): few abstractions share its structure, so a faithful description tends to retrieve it precisely.

Family — Unclustered & Miscellaneous (2551 abstractions)

Nearest neighbors

Computed from structural-signature embeddings · 2026-10-08