{"uid":"cap_nikBIG86jnYr6PBKgfVFZ","slug":"truthbear-earthquake-region-gauge-3-leg-chain-e041e8d8","name":"TruthBear Earthquake Region Gauge (3-Leg Chain)","description":"[3-LEG] Seismic activity chain, one seismic zone (?entity=california-san-andreas): leading swarm rate, USGS micro-event rate rising - DESCRIPTIVE and explicitly not a prediction -> current current max magnitude and count -> realized felt and impact reports (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: USGS. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call.","url":"https://api.truthbear.co/gauge/earthquake-region","method":"GET","headers":{},"bodySchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"type":"object","required":["type","method","queryParams"],"properties":{"type":{"const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["entity"],"properties":{"entity":{"type":"string","examples":["california-san-andreas","cascadia-pnw","alaska-aleutians","japan","sumatra-indonesia","philippines"],"description":"required - monitored object id, paired with signal_id; free list at GET /gauge/catalog?signal_id=<signal_id> -> signals[0].entities[]","x-accepted-values":{"all":"https://api.truthbear.co/schemas/gauge-earthquake-region.input.json","shown":6,"total":18}}},"additionalProperties":false}}},"output":{"type":"object","required":["type"],"properties":{"type":{"const":"json"},"example":{}}}}},"responseSchema":{"type":"json","example":{"legs":{"swarm_rate":{"band":"baseline","source_ref":"https://earthquake.usgs.gov/","record_hash":"sha256:af7d5ce3ff47de06f8c4d68751418cb34e01c10faee588a7eaac118bd4dac5bb"},"impact_realized":{"band":"felt","source_ref":"https://earthquake.usgs.gov/","record_hash":"sha256:d953b6d5974998bcc4efe988dff6b6a7cf8382c9c8e417a88974c47796215bbe"},"current_activity":{"band":"minor","source_ref":"https://earthquake.usgs.gov/","record_hash":"sha256:a840cddfd12ff422ef70ddd9aa3ef96a8fbeb0bf942e7ebc4a220a24fa4b0eec"}},"name":"California (San Andreas)","grade":"screening-level, not decision-grade","scope":{"full":"https://api.truthbear.co/scope/v1","verifiability":"unknown","monitoring_not_forecast":true,"intelligence_not_command":true},"entity":"california-san-andreas","nature":"This API supplies data organisation and trend description only. It is not a recommendation to act; the decision is yours. Purely descriptive - no judgement, no prediction. Official source plus record_hash; verify with the free /gauge/verify.","provenance":{"freshness":"fresh","age_hours_now":0,"freshness_basis":"cadence=default; fresh<=24h; recent<=192h; dead_source>1440h; age_basis=request-time(now minus observed_at)"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.25","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.25/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.25","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.25","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Vo2_pu6qOfrEKo0P87hTZ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.25","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a 3-leg sequential seismic activity chain for a specified earthquake zone, covering leading swarm rates, current USGS micro-event rates and max magnitude, and realized felt/impact reports — descriptive only, never a forecast.","exampleAgentPrompt":"Pull the 3-leg seismic activity chain for the california-san-andreas zone and tell me how many legs are currently lit, what the max magnitude is, and whether any felt reports have come in.","exampleUseCases":[{"title":"Cascadia subduction zone swarm alert","prompt":"Check the earthquake gauge for cascadia-pnw — I want to know if swarm rates are rising, what the current micro-event count and max magnitude look like, and whether any felt reports have been confirmed."},{"title":"Japan seismic status before infrastructure decision","prompt":"Pull up the current 3-leg seismic chain for Japan and tell me how many of the legs are active and what the latest USGS event rate and felt impact data show."},{"title":"Automated daily Aleutians seismic digest","prompt":"Grab today's seismic activity gauge for alaska-aleutians — give me the leading swarm rate, current max magnitude, and any realized felt reports so I can include them in my daily hazard briefing."}],"resultDescription":"A JSON object representing up to three sequential chain legs in order: (1) leading swarm rate signal, (2) current USGS micro-event rate, current max magnitude, and event count, and (3) realized felt and impact report confirmations. Confidence is expressed as the number of legs currently active and in sequence. Returns a 422 no_charge if no data is available for the requested entity, and the call is not billed.","failureModes":["422 no_charge: no data available for the requested entity — call is not billed","Invalid or unsupported entity ID returns an error — use /gauge/catalog?signal_id= to get valid entity IDs","Network or upstream USGS data unavailability may result in partial leg data or empty response","Unrecognized query parameter (additionalProperties: false) causes request rejection"],"whenToPreferThis":"Choose this endpoint when you need a structured, multi-stage descriptive snapshot of seismic activity for a specific named fault zone or seismic region, sourced from USGS, with built-in confidence signaling via leg count. Prefer this over raw USGS feeds when you want pre-packaged leading-to-lagging signal chaining (swarm → event rate → felt reports) without building the aggregation yourself. Do not use this for earthquake forecasting, prediction, or advisory — it is explicitly descriptive only.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:43:43.434Z","isFirstParty":false}