earthquakes: Earthquake data

In heike/classdata: Real-Life Data Used in Course Work

Earthquake data

Description

The USGS monitors and reports earthquakes and earthquake-like events in almost real-time at https://www.usgs.gov/natural-hazards/earthquake-hazards. For more information on the variables see https://earthquake.usgs.gov/data/comcat/data-eventterms.php

Usage

data(earthquakes)

Format

A data frame with 22 variables

Details

• time date and time of the event in UTC

• latitude geographic latitude

• longitude geographic longitude

• depth approximate depth of the event

• mag magnitude of the event

• magType method or algorithm used to calculate magnitude

• nst total number of seismic stations used to determine earthquake location.

• gap largest azimuthal gap between azimuthally adjacent stations (in degrees). In general, the smaller this number, the more reliable is the calculated horizontal position of the earthquake.

• dmin Horizontal distance from the epicenter to the nearest station (in degrees). 1 degree is approximately 111.2 kilometers. In general, the smaller this number, the more reliable is the calculated depth of the earthquake.

• rms Horizontal distance from the epicenter to the nearest station (in degrees). 1 degree is approximately 111.2 kilometers. In general, the smaller this number, the more reliable is the calculated depth of the earthquake.

• net ID of a data contributor.

• id unique identifier for the event

• updated time when the event was most recently updated

• place named geographic region near to the event

• type type of seismic event.

• horizontalError uncertainty of reported location of the event in kilometers.

• depthError uncertainty of reported depth of the event in kilometers.

• magError uncertainty of reported magnitude of the event.

• magNst total number of seismic stations used to calculate the magnitude for this earthquake.

• locationSource network that originally authored the reported location of this event.

• magSource network that originally authored the reported magnitude for this event.

heike/classdata documentation built on Nov. 24, 2023, 1:50 a.m.