Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 22-09-2019 and time 01:48:30 (Italy) in region 8 km E Norcia (PG)

A magnitude ML 0.5 earthquake occured in region: 8 km E Norcia (PG), on

  • 21-09-2019 23:48:30 (UTC)
  • 22-09-2019 01:48:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8100, 13.1910 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 8 4957 4957
Arquata del Tronto AP 10 1178 6135
Castelsantangelo sul Nera MC 10 281 6416
Montegallo AP 12 523 6939
Accumoli RI 14 667 7606
Preci PG 15 724 8330
Montemonaco AP 15 604 8934
Ussita MC 16 444 9378
Visso MC 16 1107 10485
Cascia PG 18 3217 13702
Acquasanta Terme AP 18 2916 16618
Montefortino FM 19 1178 17796

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Foligno (57155 inhabitants)
45 Km W of Teramo (54892 inhabitants)
52 Km NE of Terni (111501 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
73 Km E of Perugia (166134 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
92 Km W of Pescara (121014 inhabitants)
94 Km S of Ancona (100861 inhabitants)
95 Km NW of Chieti (51815 inhabitants)
98 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km E of Viterbo (67173 inhabitants)
99 Km NE of Tivoli (56533 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 0.5 2019-09-21
23:48:30		 42.8097 13.1912 10 2019-09-22
00:04:38		 Sala Sismica INGV-Roma 72636831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-21 23:48:30 ± 0.05
Latitude 42.8097 ± 0.0027
Longitude 13.1912 ± 0.0049
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 72636831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 381
Semi-minor axis of confidence ellipse (meter) 244
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 76
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 61
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.35613
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 14
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 72636831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-22 00:04:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2019-09-21T23:48:43.53 0.6 undecidable manual S 121 39.5271 50 -0.28 51
IV.RM33.EHZ. 2019-09-21T23:48:42.18 0.3 undecidable manual S 177 33.4443 50 0 82
IV.CESI.HNZ. 2019-09-21T23:48:41.74 0.6 undecidable manual S 313 31.8459 50 -0.01 55
IV.SSFR.HHZ. 2019-09-21T23:48:41.76 3.0 undecidable manual P -0.05 0
IV.MF5.EHZ. 2019-09-21T23:48:41.73 0.3 undecidable manual S 48 29.4483 50 0.6 71
IV.LNSS.HNZ. 2019-09-21T23:48:40.25 0.3 undecidable manual S 208 26.0517 50 0.04 82
IV.GAVE.HNZ. 2019-09-21T23:48:40.78 0.6 undecidable manual S 242 27.4503 50 0.19 53
IV.FDMO.HHZ. 2019-09-21T23:48:40.16 0.3 undecidable manual S 342 26.5512 50 -0.19 80
IV.SMA1.EHZ. 2019-09-21T23:48:39.11 0.3 undecidable manual S 149 23.0547 114 -0.21 80
IT.MTCL.HGZ. 2019-09-21T23:48:39.85 0.6 undecidable manual S 323 25.6521 50 -0.27 52
IV.T1299.EHZ. 2019-09-21T23:48:38.67 0.3 undecidable manual S 159 20.868 116 0.07 82
IV.TERO.HHZ. 2019-09-21T23:48:38.24 0.3 undecidable manual P 121 39.5271 50 0.02 81
IV.CESI.HNZ. 2019-09-21T23:48:37.00 0.6 undecidable manual P 313 31.8459 50 -0.03 54
IV.MTRA.HNZ. 2019-09-21T23:48:37.31 0.6 undecidable manual S 109 17.7711 120 -0.34 52
IV.FDMO.HHZ. 2019-09-21T23:48:36.07 0.3 undecidable manual P 342 26.5512 50 -0.15 80
IV.MMO1.EHZ. 2019-09-21T23:48:36.54 0.3 undecidable manual S 48 14.874 124 -0.27 80
IV.RM33.EHZ. 2019-09-21T23:48:36.81 0.3 undecidable manual P 177 33.4443 50 -0.46 74
IV.MF5.EHZ. 2019-09-21T23:48:36.95 0.3 undecidable manual P 48 29.4483 50 0.29 78
IV.LNSS.HNZ. 2019-09-21T23:48:36.23 0.3 undecidable manual P 208 26.0517 50 0.09 81
IV.GAVE.HNZ. 2019-09-21T23:48:36.37 0.6 undecidable manual P 242 27.4503 50 0.01 55
IT.MTCL.HGZ. 2019-09-21T23:48:35.94 0.3 undecidable manual P 323 25.6521 50 -0.15 80
IV.T1299.EHZ. 2019-09-21T23:48:35.72 0.1 undecidable manual P 159 20.868 116 0.51 100
IV.SMA1.EHZ. 2019-09-21T23:48:35.55 0.3 undecidable manual P 149 23.0547 114 -0.08 82
IV.MMO1.EHZ. 2019-09-21T23:48:34.20 0.3 undecidable manual P 48 14.874 124 0.03 84
IV.NRCA.HNZ. 2019-09-21T23:48:34.72 0.3 undecidable manual S 293 6.7932 146 -0.07 84
IV.MTRA.HNZ. 2019-09-21T23:48:34.61 0.6 undecidable manual P 109 17.7711 120 -0.05 55
IV.NRCA.HNZ. 2019-09-21T23:48:33.22 0.3 undecidable manual P 293 6.7932 146 0.21 82
IV.MC2.EHZ. 2019-09-21T23:48:33.81 0.3 undecidable manual P 359 11.2776 132 0.2 81
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.5 0.000018422905 0.32 AML other m 2019-09-21T23:48:40.83
IV.SMA1.EHN. ML:0.4 0.00001559853 0.1024 AML other m 2019-09-21T23:48:40.26
IV.FDMO.HHE. ML:0.4 0.00001521651 0.1664 AML other m 2019-09-21T23:48:40.38
IV.FDMO.HHN. ML:0.4 0.000015787169999999998 0.2048 AML other m 2019-09-21T23:48:40.70
IV.RM33.EHE. ML:0.6 0.0000155886065 0.064 AML other m 2019-09-21T23:48:43.27
IV.RM33.EHN. ML:0.4 0.000009745637 0.2176 AML other m 2019-09-21T23:48:43.62
IV.TERO.HHE. ML:0.5 0.0000098671665 0.0768 AML other m 2019-09-21T23:48:43.93
IV.TERO.HHN. ML:0.5 0.000012434438 0.064 AML other m 2019-09-21T23:48:44.70
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