Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 22-02-2021 and time 06:56:23 (UTC) in region 4 km NE Nocera Umbra (PG)

A magnitude ML 0.8 earthquake occured in region: 4 km NE Nocera Umbra (PG), on

  • 22-02-2021 06:56:23 (UTC)
  • 22-02-2021 07:56:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1470, 12.8080 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Nocera Umbra PG 4 5839 5839
Gualdo Tadino PG 10 15208 21047
Valtopina PG 11 1398 22445
Fiuminata MC 11 1402 23847
Sefro MC 12 422 24269
Serravalle di Chienti MC 14 1070 25339
Pioraco MC 15 1134 26473
Esanatoglia MC 16 2034 28507
Valfabbrica PG 17 3389 31896
Fossato di Vico PG 17 2840 34736
Assisi PG 18 28299 63035

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NE of Foligno (57155 inhabitants)
34 Km E of Perugia (166134 inhabitants)
66 Km N of Terni (111501 inhabitants)
78 Km SW of Ancona (100861 inhabitants)
79 Km S of Fano (60888 inhabitants)
83 Km E of Arezzo (99543 inhabitants)
85 Km S of Pesaro (94582 inhabitants)
91 Km NW of Teramo (54892 inhabitants)
99 Km NE of Viterbo (67173 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 0.8 2021-02-22
06:56:23		 43.147 12.8075 10 2021-02-22
07:29:31		 Sala Sismica INGV-Roma 87373281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-22 06:56:23 ± 0.05
Latitude 43.1470 ± 0.0045
Longitude 12.8075 ± 0.0062
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87373281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 622
Semi-minor axis of confidence ellipse (meter) 292
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 234
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.29498
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 87373281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-22 07:29:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CR.STON.BHZ. 2021-02-22T06:58:05.14 3.0 undecidable manual Sn 2.3 0
OT.OT14.EHZ. 2021-02-22T06:57:43.69 3.0 undecidable manual Sn 4.98 0
IV.GIZZ.HHZ. 2021-02-22T06:57:36.18 3.0 negative manual Pn -0.84 0
IV.SPS2.HHZ. 2021-02-22T06:57:33.87 3.0 negative manual Pn -0.27 0
IV.TDS.HHZ. 2021-02-22T06:57:28.37 3.0 undecidable manual Pn -1.6 0
IV.EUCT.HNZ. 2021-02-22T06:57:19.75 3.0 undecidable manual Pn 3.84 0
IV.STAL.HHZ. 2021-02-22T06:57:14.21 3.0 positive manual Pn 1.63 0
SL.LJU.BHZ. 2021-02-22T06:57:13.42 3.0 undecidable manual Pn 0.44 0
OX.CLUD.HHZ. 2021-02-22T06:57:11.81 3.0 undecidable manual Pn -3.46 0
IV.SBPO.HNZ. 2021-02-22T06:57:04.16 3.0 negative manual Pn 2.13 0
IV.FAGN.HHZ. 2021-02-22T06:57:01.49 3.0 undecidable manual S 0.98 0
IV.MELA.HHZ. 2021-02-22T06:56:59.70 3.0 positive manual Pn -0.88 0
IV.IMOL.HNZ. 2021-02-22T06:56:49.97 3.0 positive manual P 0.33 0
TV.SF04.EHZ. 2021-02-22T06:56:39.97 3.0 undecidable manual P -1.58 0
IV.CSP1.EHZ. 2021-02-22T06:56:35.01 0.1 undecidable manual S 101 32.745 50 0.26 93
IV.EL6.EHZ. 2021-02-22T06:56:34.27 0.1 undecidable manual S 50 31.2465 50 -0.08 97
IV.FDMO.HHZ. 2021-02-22T06:56:32.78 0.1 undecidable manual S 118 25.752 50 -0.11 97
IV.ASSB.HHZ. 2021-02-22T06:56:30.09 0.3 undecidable manual S 226 16.6722 121 -0.07 74
IV.CESI.HHZ. 2021-02-22T06:56:30.38 0.1 undecidable manual S 153 17.5713 120 -0.05 100
IV.CSP1.EHZ. 2021-02-22T06:56:30.01 0.3 undecidable manual P 101 32.745 50 0.07 72
IV.ATCC.EHZ. 2021-02-22T06:56:29.36 0.1 undecidable manual S 287 14.1747 126 -0.08 100
IV.EL6.EHZ. 2021-02-22T06:56:29.61 0.1 undecidable manual P 50 31.2465 50 -0.09 96
IV.FDMO.HHZ. 2021-02-22T06:56:28.77 0.1 undecidable manual P 118 25.752 50 -0.09 97
IV.ATCC.EHZ. 2021-02-22T06:56:27.10 0.3 undecidable manual P 287 14.1747 126 0.23 72
IV.ASSB.HHZ. 2021-02-22T06:56:27.35 0.1 undecidable manual P 226 16.6722 121 0.06 99
IV.CESI.HHZ. 2021-02-22T06:56:27.47 0.1 undecidable manual P 153 17.5713 120 0.03 100
IV.FOSV.EHZ. 2021-02-22T06:56:26.17 3.0 negative manual P -0.59 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FOSV.EHE. ML:0.4 0.000020491247499999998 0.16 AML other m 2021-02-22T06:56:31.12
IV.FOSV.EHN. ML:0.5 0.000022948725 0.1792 AML other m 2021-02-22T06:56:30.32
IV.ATCC.EHE. ML:0.9 0.00007436666999999999 0.1024 AML other m 2021-02-22T06:56:29.64
IV.ATCC.EHN. ML:0.7 0.000055117224999999996 0.1184 AML other m 2021-02-22T06:56:29.51
IV.ASSB.HHE. ML:0.5 0.000028468675 0.16 AML other m 2021-02-22T06:56:30.34
IV.ASSB.HHN. ML:0.6 0.000033596799999999997 0.1216 AML other m 2021-02-22T06:56:30.70
IV.CESI.HNE. ML:1.0 0.00007745163500000001 0.56 AML other m 2021-02-22T06:56:28.73
IV.CESI.HNN. ML:1.4 0.00018376005 0.9024 AML other m 2021-02-22T06:56:29.20
IV.CESI.HHE. ML:0.6 0.000028247319999999998 0.1408 AML other m 2021-02-22T06:56:31.32
IV.CESI.HHN. ML:0.4 0.000020755389999999997 0.1216 AML other m 2021-02-22T06:56:31.68
IV.FDMO.HHE. ML:0.4 0.0000145767305 0.16 AML other m 2021-02-22T06:56:33.17
IV.FDMO.HHN. ML:0.6 0.000025415475 0.1408 AML other m 2021-02-22T06:56:33.00
IV.EL6.EHE. ML:0.8 0.000029190810000000006 0.1408 AML other m 2021-02-22T06:56:34.86
IV.EL6.EHN. ML:0.9 0.00004209594 0.16 AML other m 2021-02-22T06:56:34.86
IV.CSP1.EHE. ML:1.0 0.000046622385 0.88 AML other m 2021-02-22T06:56:41.10
IV.CSP1.EHN. ML:1.1 0.00005007669500000001 0.96 AML other m 2021-02-22T06:56:45.32
TV.SF04.EHE. ML:1.5 0.000033749639999999996 0.5792 AML other m 2021-02-22T06:57:11.92
TV.SF04.EHN. ML:1.5 0.000033332470000000004 0.2976 AML other m 2021-02-22T06:56:55.06
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download