Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 16-07-2021 and time 11:36:59 (Italy) in region 1 km S Norcia (PG)

A magnitude ML 0.8 earthquake occured in region: 1 km S Norcia (PG), on

  • 16-07-2021 09:36:59 (UTC)
  • 16-07-2021 11:36:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7820, 13.0940 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
Norcia PG 1 4957 4957
Cascia PG 10 3217 8174
Preci PG 12 724 8898
Castelsantangelo sul Nera MC 14 281 9179
Cerreto di Spoleto PG 15 1075 10254
Poggiodomo PG 15 117 10371
Accumoli RI 16 667 11038
Arquata del Tronto AP 17 1178 12216
Visso MC 17 1107 13323
Sellano PG 18 1079 14402
Ussita MC 19 444 14846
Monteleone di Spoleto PG 19 599 15445
Vallo di Nera PG 19 364 15809
Cittareale RI 19 482 16291

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SE of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km N of Tivoli (56533 inhabitants)
98 Km W of Pescara (121014 inhabitants)
99 Km SW of Ancona (100861 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 2021-07-16
09:36:59		 42.7818 13.094 10 2021-07-16
09:43:42		 Sala Sismica INGV-Roma 92820491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-16 09:36:59 ± 0.22
Latitude 42.7818 ± 0.0117
Longitude 13.0940 ± 0.0270
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 92820491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2413
Semi-minor axis of confidence ellipse (meter) 559
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 118
Circular confidence region, given by single value of horizontal uncertainty (meter) 2410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.26260
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 92820491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-16 09:43:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CELI.HHZ. 2021-07-16T09:38:48.23 3.0 undecidable manual Sn -4.3 0
IV.ZEN8.EHZ. 2021-07-16T09:38:43.94 3.0 undecidable manual Sg 13.94 0
AC.VLO.HHZ. 2021-07-16T09:38:36.56 3.0 undecidable manual Pg 18.790001 0
IV.ECTS.HHZ. 2021-07-16T09:38:25.31 3.0 undecidable manual Pg 10.49 0
IX.SCL3.EHZ.02 2021-07-16T09:38:23.28 3.0 undecidable manual Sg 7.1 0
IV.CDRU.HHZ. 2021-07-16T09:38:16.93 3.0 undecidable manual Sn -0.82 0
IV.GIZZ.HHZ. 2021-07-16T09:38:14.35 3.0 undecidable manual Pg 8.53 0
IV.NDIM.HHZ. 2021-07-16T09:38:13.31 3.0 undecidable manual Sn 0.1 0
IV.VOBA.EHZ. 2021-07-16T09:37:55.42 3.0 undecidable manual Pn 4.05 0
IV.CADC.EHZ. 2021-07-16T09:37:54.27 3.0 positive manual Pn 2.82 0
IV.CAPR.HNZ. 2021-07-16T09:37:50.96 3.0 undecidable manual Pn -3.61 0
MN.TRI.HHZ. 2021-07-16T09:37:48.41 3.0 negative manual Pg 3.01 0
IV.LPEL.HHZ. 2021-07-16T09:37:36.42 3.0 undecidable manual S 0.96 0
IV.VBKN.HHZ. 2021-07-16T09:37:34.19 3.0 undecidable manual Pn -0.29 0
IV.PE3.EHZ. 2021-07-16T09:37:33.43 3.0 undecidable manual S -0.19 0
IV.VAGA.HHZ. 2021-07-16T09:37:26.92 3.0 undecidable manual Pn 0.42 0
IV.CRE.HHZ. 2021-07-16T09:37:19.95 3.0 positive manual P -0.74 0
IV.PP3.EHZ. 2021-07-16T09:37:18.86 3.0 undecidable manual S -6.13 0
IV.VIVA.HHZ. 2021-07-16T09:37:15.60 3.0 positive manual P -3.17 0
IV.PE3.EHZ. 2021-07-16T09:37:14.03 3.0 positive manual P -4.43 0
IV.FDMO.HHZ. 2021-07-16T09:37:08.64 0.6 undecidable manual S 359 28.2495 50 -0.97 38
IV.LNSS.HHZ. 2021-07-16T09:37:07.10 0.6 undecidable manual S 192 20.3685 117 -0.21 49
IV.CESI.HNZ. 2021-07-16T09:37:06.06 0.1 undecidable manual P 328 29.1486 50 0.62 87
IV.GAVE.EHZ. 2021-07-16T09:37:06.53 0.6 undecidable manual S 239 19.0698 118 -0.4 47
IV.FDMO.HHZ. 2021-07-16T09:37:05.24 0.1 undecidable manual P 359 28.2495 50 -0.06 100
IV.MC2.EHZ. 2021-07-16T09:37:05.66 0.6 undecidable manual S 28 16.3725 122 -0.44 47
IV.LNSS.HHZ. 2021-07-16T09:37:04.15 0.6 undecidable manual P 192 20.3685 117 0.17 50
IV.NRCA.HHZ. 2021-07-16T09:37:03.72 0.6 undecidable manual S 16 5.994 150 0.19 51
IV.MC2.EHZ. 2021-07-16T09:37:03.52 0.6 negative manual P 28 16.3725 122 0.24 49
IV.GAVE.EHZ. 2021-07-16T09:37:03.75 0.6 positive manual P 239 19.0698 118 0 51
IV.NRCA.HHZ. 2021-07-16T09:37:01.92 0.3 undecidable manual P 16 5.994 150 0.13 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.0 0.00017099999999999998 0.16 AML other m 2021-07-16T09:37:03.68
IV.NRCA.HHE. ML:1.1 0.0002035 0.1 AML other m 2021-07-16T09:37:03.69
IV.GAVE.EHE. ML:0.8 0.000046700000000000003 0.36 AML other m 2021-07-16T09:37:07.21
IV.GAVE.EHN. ML:0.8 0.000044899999999999994 0.8 AML other m 2021-07-16T09:37:07.15
IV.LNSS.HHE. ML:0.7 0.000038687025 0.1408 AML other m 2021-07-16T09:37:07.96
IV.LNSS.HHN. ML:0.7 0.00003343399 0.1408 AML other m 2021-07-16T09:37:08.02
IV.FDMO.HHE. ML:0.6 0.000020088845 0.1216 AML other m 2021-07-16T09:37:09.68
IV.FDMO.HHN. ML:0.6 0.00002217927 0.1408 AML other m 2021-07-16T09:37:09.75
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