Earthquake shakes northeastern Japan – USA TODAY
 Cleveland Leader |
Earthquake shakes northeastern Japan
USA TODAY TOKYO (AP) – A strong earthquake has struck off the coast of northeastern Japan, but no tsunami is expected. The US Geological Survey says the magnitude-6.1 earthquake hit early Thursday and was centered about 66 miles northeast of Hachinohe at a depth … Earthquake Magnitude: Just How Big Was the Biggest Earthquake? Over 5000 aftershocks have rattled Japanese quake zone |
| Parameter | Value | Description |
|---|---|---|
| Magnitude | mb | The magnitude for the event. |
| Longitude | ° East | Decimal degrees longitude. Negative values for western longitudes. |
| Latitude | ° North | Decimal degrees latitude. Negative values for southern latitudes. |
| Depth | km | Depth of the event in kilometers. |
| Place | Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name. | |
| Time | 1970-01-01 00:00:00 | Time when the event occurred. UTC/GMT |
| Updated | 1970-01-01 00:00:00 | Time when the event was most recently updated. UTC/GMT |
| Timezone offset | Timezone offset from UTC in minutes at the event epicenter. | |
| Felt | The total number of felt reports | |
| CDI | The maximum reported intensity for the event. | |
| MMI | The maximum estimated instrumental intensity for the event. | |
| Alert Level | The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red. | |
| Review Status | Indicates whether the event has been reviewed by a human. | |
| Tsunami | This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist. | |
| SIG | A number describing how significant the event is. Larger numbers indicate a more significant event. | |
| Network | The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event. | |
| Sources | A comma-separated list of network contributors. | |
| Number of Stations Used | The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake. | |
| Horizontal Distance | Horizontal distance from the epicenter to the nearest station (in degrees). | |
| Root Mean Square | sec | The root-mean-square (RMS) travel time residual, in sec, using all weights. |
| Azimuthal Gap | The largest azimuthal gap between azimuthally adjacent stations (in degrees). | |
| Magnitude Type | The method or algorithm used to calculate the preferred magnitude for the event. | |
| Event Type | Type of seismic event. | |
| Event ID | Id of event. | |
| Event Code | An identifying code assigned by, and unique from, the corresponding source for the event. | |
| Event IDS | A comma-separated list of event ids that are associated to an event. |
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