Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 25-10-2019 and time 20:41:05 (UTC) in region 8 km E Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 8 km E Norcia (PG), on

  • 25-10-2019 20:41:05 (UTC)
  • 25-10-2019 22:41:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8200, 13.1840 at 13 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 8 4957 4957
Castelsantangelo sul Nera MC 9 281 5238
Arquata del Tronto AP 11 1178 6416
Montegallo AP 13 523 6939
Preci PG 14 724 7663
Ussita MC 14 444 8107
Accumoli RI 15 667 8774
Visso MC 15 1107 9881
Montemonaco AP 15 604 10485
Cascia PG 18 3217 13702
Montefortino FM 19 1178 14880
Acquasanta Terme AP 19 2916 17796
Bolognola MC 20 142 17938

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km E of Foligno (57155 inhabitants)
46 Km W of Teramo (54892 inhabitants)
52 Km NE of Terni (111501 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
72 Km E of Perugia (166134 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
93 Km W of Pescara (121014 inhabitants)
96 Km NW of Chieti (51815 inhabitants)
99 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km E of Viterbo (67173 inhabitants)
100 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 1.1 2019-10-25
20:41:05		 42.8197 13.1843 13 2019-10-25
20:51:58		 Sala Sismica INGV-Roma 73446251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-25 20:41:05 ± 0.04
Latitude 42.8197 ± 0.0027
Longitude 13.1843 ± 0.0049
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 73446251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 379
Semi-minor axis of confidence ellipse (meter) 71
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 59
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) 62
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.05306
Epicentral distance of station farthest from the epicenter (degree) 0.45056
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.0
Num. used stations 2
Type of magnitude ML
Reference to an origin 73446251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-10-25 20:51:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HNZ. 2019-10-25T20:41:18.76 0.6 undecidable manual S 122 40.5261 93 0.02 49
IV.LNSS.HNZ. 2019-10-25T20:41:15.11 0.3 undecidable manual S 206 26.751 96 0.05 75
IV.CESI.HNZ. 2019-10-25T20:41:15.86 0.6 undecidable manual S 312 30.6471 95 -0.23 48
IV.FDMO.HHZ. 2019-10-25T20:41:14.34 0.3 undecidable manual S 342 25.3524 97 -0.33 70
IV.T1299.HNZ. 2019-10-25T20:41:14.16 0.3 undecidable manual S 159 22.0668 100 0.34 71
IV.MOMA.HNZ. 2019-10-25T20:41:14.84 0.6 undecidable manual P 268 50.0166 92 0.27 46
IT.MTCL.HGZ. 2019-10-25T20:41:14.24 0.3 undecidable manual S 322 24.4533 98 -0.22 72
IV.SMA1.EHZ. 2019-10-25T20:41:14.13 0.3 undecidable manual S 150 24.3534 98 -0.28 72
IV.ARRO.EHE. 2019-10-25T20:41:13.33 0.3 undecidable manual P 232 43.3233 93 -0.21 71
IV.TERO.HNZ. 2019-10-25T20:41:13.15 0.1 undecidable manual P 122 40.5261 93 0.03 98
IV.FEMA.HNZ. 2019-10-25T20:41:13.12 0.3 undecidable manual S 325 19.2696 103 0.04 76
IV.RM33.EHN. 2019-10-25T20:41:12.16 0.1 undecidable manual P 176 34.5432 94 -0.03 99
IV.MTRA.EHZ. 2019-10-25T20:41:12.71 0.3 undecidable manual S 112 18.6702 104 -0.21 74
IV.CAMP.HHZ. 2019-10-25T20:41:12.13 0.1 undecidable manual P 150 36.4413 94 -0.35 93
IV.CESI.HNZ. 2019-10-25T20:41:11.68 0.1 undecidable manual P 312 30.6471 95 0.09 99
IV.MF5.EHE. 2019-10-25T20:41:11.41 0.1 undecidable manual P 50 29.1486 96 0.05 100
IV.CSP1.EHZ. 2019-10-25T20:41:11.58 0.1 undecidable manual P 3 30.2475 95 0.05 100
IV.LNSS.HNZ. 2019-10-25T20:41:11.05 0.3 undecidable manual P 206 26.751 96 0.05 75
IV.GUMA.HNZ. 2019-10-25T20:41:11.57 0.1 undecidable manual P 24 29.6481 95 0.14 98
IT.MTCL.HGZ. 2019-10-25T20:41:10.59 0.3 undecidable manual P 322 24.4533 98 -0.05 75
IV.SMA1.EHZ. 2019-10-25T20:41:10.62 0.3 undecidable manual P 150 24.3534 98 0 76
IV.MC2.EHZ. 2019-10-25T20:41:10.93 0.3 undecidable manual S 2 10.1787 129 0.04 77
IV.FEMA.HNZ. 2019-10-25T20:41:10.33 0.3 undecidable manual P 325 19.2696 103 0.48 70
IV.FDMO.HHZ. 2019-10-25T20:41:10.75 0.3 undecidable manual P 342 25.3524 97 -0.02 75
IV.T1299.HNZ. 2019-10-25T20:41:10.45 0.1 undecidable manual P 159 22.0668 100 0.18 98
IV.NRCA.HHZ. 2019-10-25T20:41:09.76 0.3 undecidable manual S 285 5.8941 148 -0.38 74
IV.MTRA.EHZ. 2019-10-25T20:41:09.82 0.6 undecidable manual P 112 18.6702 104 0.06 51
IV.NRCA.HHZ. 2019-10-25T20:41:08.18 0.3 undecidable manual P 285 5.8941 148 0.03 77
IV.MC2.EHZ. 2019-10-25T20:41:08.78 0.3 undecidable manual P 2 10.1787 129 0.19 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.1 0.00016 1.08 AML other m 2019-10-25T20:41:10.00
IV.NRCA.HHN. ML:1.1 0.0001625 0.12 AML other m 2019-10-25T20:41:10.00
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