Earthquake Alert Assurance Lab

Independent reference implementation using public and synthetic data. Not affiliated with or endorsed by USGS. Not deployed for public warning or life-safety decisions.

Browser simulation

Event monitor and decision trace

Feed stateLoading

Events0

Candidate decisions0

Evidence testsLoading

Normalized events

Event	Magnitude	Age	Demo quality	Decision
Loading synthetic events...

Public-feed events are earthquake catalog observations, not early warnings. Quality values and decision thresholds are illustrative. Browser tests do not run the C++ engine or the NATS broker.

Controlled adverse conditions

Fault injection

No fault scenario executed in this browser session.

Local / CI stack, separate from this browser

Assurance architecture

01IngestUSGS public or synthetic events

02PersistNATS JetStream and replay

03DecideBounded C++ component

04AggregateOrdering and deduplication

05EvidenceReports, CI artifacts, trace

Recorded test runs

Assurance evidence

Loading report

Scenarios passed-

Failures-

P95 process round trip-

Release-

JetStream messages-

Durable consumers-

Dedupe proof-

Simulated alert path-

C++ report: -

NATS report: -

Process timings include executable startup and are not a real-time latency guarantee. Transport evidence is a separate dated run. Hashes are integrity checks, not digital signatures.

Evidence hash-

Transport evidence hash-

RFI 140G0326Q0223

Demonstration scope

ImplementedBounded C++ inputs, deterministic test cases, a browser policy checked against C++, and executed browser fault scenarios.

Recorded transport runJetStream configuration, duplicate-message suppression, and a simulated event path. Replay and crash-recovery testing remain incomplete.

Pipeline configurationBuild, analysis, tests, coverage, and evidence jobs are defined. A successful hosted pipeline must be verified separately.

Proposal evidence gapThis lab alone does not prove personnel experience or complete the agency's task-by-task capability response.