@seismo/core
Version:
This is the package for the core library of Seismo, a JavaScript library for seismic data processing and visualization. It provides utilities for handling seismic data, including FDSN web services, waveform processing, and event handling. The library is d
171 lines (170 loc) • 6.21 kB
JavaScript
;
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Object.defineProperty(o, "default", { enumerable: true, value: v });
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o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
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Object.defineProperty(exports, "__esModule", { value: true });
exports.isValidMarker = isValidMarker;
exports.createMarkersForTravelTimes = createMarkersForTravelTimes;
exports.createMarkerForOriginTime = createMarkerForOriginTime;
exports.createFullMarkersForQuakeAtStation = createFullMarkersForQuakeAtStation;
exports.createFullMarkersForQuakeAtChannel = createFullMarkersForQuakeAtChannel;
exports.createMarkerForQuakePicks = createMarkerForQuakePicks;
exports.createMarkerForPicks = createMarkerForPicks;
const distaz = __importStar(require("../utils/distaz"));
const luxon_1 = require("luxon");
function isValidMarker(v) {
if (!v || typeof v !== "object") {
return false;
}
const m = v;
return (typeof m.time === "string" &&
typeof m.name === "string" &&
typeof m.markertype === "string" &&
typeof m.description === "string" &&
(!("link" in m) || typeof m.link === "string"));
}
/**
* Creates Markers for all of the arrivals in ttime.arrivals, relative
* to the given Quake.
*
* @param quake quake the travel times are relative to
* @param ttime travel times json object as returned from the
* IRIS traveltime web service, or the json output of TauP
* @returns array of Markers suitable for adding to a seismograph
*/
function createMarkersForTravelTimes(quake, ttime) {
return ttime.arrivals.map((a) => {
return {
markertype: "predicted",
name: a.phase,
time: quake.time.plus(luxon_1.Duration.fromMillis(1000 * a.time)),
description: "",
};
});
}
/**
* Creates a Marker for the origin time in ttime.arrivals, for the given Quake.
*
* @param quake quake the travel times are relative to
* @returns Marker suitable for adding to a seismograph
*/
function createMarkerForOriginTime(quake) {
return {
markertype: "predicted",
name: "origin",
time: quake.time,
description: "",
};
}
function createFullMarkersForQuakeAtStation(quake, station) {
const markers = [];
if (quake.hasOrigin()) {
const daz = distaz.distaz(station.latitude, station.longitude, quake.latitude, quake.longitude);
let magVal = "";
let magStr = "";
if (quake.hasPreferredMagnitude()) {
magVal = quake.preferredMagnitude
? `${quake.preferredMagnitude.mag}`
: "";
magStr = quake.preferredMagnitude
? quake.preferredMagnitude.toString()
: "";
}
markers.push({
markertype: "predicted",
name: `M${magVal} ${quake.time.toFormat("HH:mm")}`,
time: quake.time,
link: `https://earthquake.usgs.gov/earthquakes/eventpage/${quake.eventId}/executive`,
description: `${quake.time.toISO()}
${quake.latitude.toFixed(2)}/${quake.longitude.toFixed(2)} ${(quake.depth / 1000).toFixed(2)} km
${quake.description}
${magStr}
${daz.delta.toFixed(2)} deg to ${station.stationCode} (${daz.distanceKm} km)
`,
});
}
return markers;
}
function createFullMarkersForQuakeAtChannel(quake, channel) {
let markers = createFullMarkersForQuakeAtStation(quake, channel.station);
if (quake.preferredOrigin) {
markers = markers.concat(createMarkerForPicks(quake.preferredOrigin, channel));
}
return markers;
}
/**
* Creates a Marker for the picked arrival times in quake.pickList, for the given Quake.
*
* @param quake quake the travel times are relative to
* @param channel channel picks made on
* @returns Marker suitable for adding to a seismograph
*/
function createMarkerForQuakePicks(quake, channel) {
const markers = [];
if (quake.pickList) {
quake.pickList.forEach((pick) => {
if (pick && pick.isOnChannel(channel)) {
markers.push({
markertype: "pick",
name: "pick",
time: pick.time,
description: "",
});
}
});
}
return markers;
}
/**
* Creates a Marker for the picked arrival times in quake.arrivals, for the given Quake.
*
* @param origin quake the travel times are relative to
* @param channel channel picks made on
* @returns Marker suitable for adding to a seismograph
*/
function createMarkerForPicks(origin, channel) {
const markers = [];
if (origin.arrivals) {
origin.arrivals.forEach((arrival) => {
if (arrival && arrival.pick.isOnChannel(channel)) {
markers.push({
markertype: "pick",
name: arrival.phase,
time: arrival.pick.time,
description: "",
});
}
});
}
return markers;
}