Earthquake with magnitude of ML 0.9 on date 21-02-2021 and time 00:18:16 (UTC) in region 2 km NE Poggiodomo (PG)

A magnitude ML 0.9 earthquake occured in region: 2 km NE Poggiodomo (PG), on

  • 21-02-2021 00:18:16 (UTC)
  • 21-02-2021 01:18:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.72, 12.96 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Poggiodomo PG 2 117 117
Cascia PG 5 3217 3334
Monteleone di Spoleto PG 8 599 3933
Vallo di Nera PG 9 364 4297
Sant'Anatolia di Narco PG 10 564 4861
Scheggino PG 10 461 5322
Cerreto di Spoleto PG 11 1075 6397
Norcia PG 14 4957 11354
Ferentillo TR 18 1913 13267
Spoleto PG 18 38218 51485
Polino TR 18 233 51718
Leonessa RI 18 2435 54153
Campello sul Clitunno PG 18 2442 56595
Preci PG 19 724 57319
Sellano PG 19 1079 58398

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NE of Terni (111501 inhabitants)
33 Km SE of Foligno (57155 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
62 Km W of Teramo (54892 inhabitants)
63 Km SE of Perugia (166134 inhabitants)
78 Km E of Viterbo (67173 inhabitants)
83 Km N of Guidonia Montecelio (88673 inhabitants)
86 Km N of Tivoli (56533 inhabitants)
100 Km NE of Roma (2864731 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.9 2021-02-21
00:18:16
42.72 12.96 10 2021-02-21
00:32:48
Sala Sismica INGV-Roma 87342891
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-21 00:18:16 ± 0.05
Latitude 42.72 ± 0.00
Longitude 12.96 ± 0.00
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87342891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 408
Semi-minor axis of confidence ellipse (meter) 227
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 259
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 116
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.05666
Epicentral distance of station farthest from the epicenter (degree) 0.32645
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 87342891
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-21 00:32:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2021-02-21T00:18:28.80 0.6 undecidable manual S 17 0.3265 50 -0.07 50
IV.CESI.HHZ. 2021-02-21T00:18:27.80 0.6 undecidable manual S 352 0.2833 50 0.2 49
IV.RM33.EHZ. 2021-02-21T00:18:27.76 0.3 undecidable manual S 139 0.286 50 0.09 76
IV.NRCA.HHZ. 2021-02-21T00:18:23.68 0.6 undecidable manual S 46 0.1583 121 -0.02 53
IV.FDMO.HHZ. 2021-02-21T00:18:23.62 1.0 positive manual P 17 0.3265 50 -0.06 25
IV.CESI.HHZ. 2021-02-21T00:18:22.79 0.1 undecidable manual P 352 0.2833 50 -0.16 100
IV.LNSS.HHZ. 2021-02-21T00:18:22.82 0.6 undecidable manual S 153 0.1358 125 -0.13 52
IV.RM33.EHZ. 2021-02-21T00:18:22.81 1.0 undecidable manual P 139 0.286 50 -0.18 25
IV.NRCA.HHZ. 2021-02-21T00:18:20.78 0.3 negative manual P 46 0.1583 121 0.08 78
IV.GAVE.EHZ. 2021-02-21T00:18:20.74 0.6 undecidable manual S 236 0.0567 149 -0.08 53
IV.LNSS.HHZ. 2021-02-21T00:18:20.38 1.0 negative manual P 153 0.1358 125 0.12 26
IV.GAVE.EHZ. 2021-02-21T00:18:19.17 0.3 positive manual P 236 0.0567 149 0.14 79
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:1.2 0.0002235 0.24 AML other m 2021-02-21T00:18:20.93
IV.GAVE.EHE. ML:1.2 0.000228 0.86 AML other m 2021-02-21T00:18:21.08
IV.LNSS.HHN. ML:0.7 4.5E-5 0.16 AML other m 2021-02-21T00:18:23.70
IV.NRCA.HHE. ML:0.9 6.84E-5 0.14 AML other m 2021-02-21T00:18:23.84
IV.NRCA.HHN. ML:0.7 4.135E-5 1.14 AML other m 2021-02-21T00:18:23.96
IV.LNSS.HHE. ML:0.7 5.145E-5 0.82 AML other m 2021-02-21T00:18:24.63
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download