Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 25-07-2020 and time 08:05:33 (UTC) in region 3 km S Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 3 km S Norcia (PG), on

  • 25-07-2020 08:05:33 (UTC)
  • 25-07-2020 10:05:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7640, 13.1010 at 11 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 3 4957 4957
Cascia PG 9 3217 8174
Preci PG 14 724 8898
Accumoli RI 14 667 9565
Poggiodomo PG 15 117 9682
Castelsantangelo sul Nera MC 15 281 9963
Arquata del Tronto AP 16 1178 11141
Cerreto di Spoleto PG 16 1075 12216
Cittareale RI 17 482 12698
Monteleone di Spoleto PG 17 599 13297
Visso MC 19 1107 14404
Vallo di Nera PG 19 364 14768
Sellano PG 20 1079 15847

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km SE of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
52 Km NW of L'Aquila (69753 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km N of Tivoli (56533 inhabitants)
97 Km W of Pescara (121014 inhabitants)
99 Km W of Chieti (51815 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 2020-07-25
08:05:33		 42.7643 13.1012 11 2020-07-25
08:20:12		 Sala Sismica INGV-Roma 81327601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-25 08:05:33 ± 0.11
Latitude 42.7643 ± 0.0036
Longitude 13.1012 ± 0.0073
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81327601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 599
Semi-minor axis of confidence ellipse (meter) 124
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 261
Circular confidence region, given by single value of horizontal uncertainty (meter) 600.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.39570
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 81327601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-25 08:20:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2020-07-25T08:06:03.47 3.0 undecidable manual S -6.05 0
IV.SFI.EHZ. 2020-07-25T08:06:02.67 3.0 undecidable manual P 0.2 0
IV.EL6.EHZ. 2020-07-25T08:05:54.67 3.0 undecidable manual S -2.64 0
IV.MOMA.HNZ. 2020-07-25T08:05:48.25 0.3 undecidable manual S 276 43.4232 50 0.19 70
IV.CSP1.EHZ. 2020-07-25T08:05:46.62 0.3 undecidable manual S 13 37.3293 50 0.21 71
IV.RM33.EHZ. 2020-07-25T08:05:44.42 0.3 undecidable manual S 162 29.748 50 0.01 74
IV.FDMO.HHZ. 2020-07-25T08:05:44.27 0.3 undecidable manual S 358 30.2475 50 -0.25 71
IV.SMA1.EHZ. 2020-07-25T08:05:43.73 0.3 undecidable manual S 128 24.1536 50 0.82 59
IT.MTCL.HGZ. 2020-07-25T08:05:43.50 0.3 undecidable manual S 342 26.751 50 -0.1 73
IV.TERO.HHZ. 2020-07-25T08:05:42.38 0.6 undecidable manual P 111 43.9227 50 0.21 46
IV.MMO1.EHZ. 2020-07-25T08:05:42.91 0.3 undecidable manual S 51 23.6541 50 0.13 73
IV.FEMA.HNZ. 2020-07-25T08:05:42.33 0.3 undecidable manual S 349 22.3554 50 -0.09 74
IV.MTRA.EHZ. 2020-07-25T08:05:42.60 0.3 undecidable manual S 92 24.0537 50 -0.28 71
IV.MOMA.HNZ. 2020-07-25T08:05:42.59 0.3 undecidable manual P 276 43.4232 50 0.49 66
IV.CSP1.EHZ. 2020-07-25T08:05:41.21 0.3 undecidable manual P 13 37.3293 50 0.06 73
IV.MC2.EHZ. 2020-07-25T08:05:41.50 0.3 undecidable manual S 24 17.7711 50 0.29 72
IV.LNSS.HHZ. 2020-07-25T08:05:41.05 0.3 undecidable manual S 196 18.5703 50 -0.36 71
IV.FDMO.HHZ. 2020-07-25T08:05:40.03 0.3 undecidable manual P 358 30.2475 50 -0.03 74
IV.SMA1.EHZ. 2020-07-25T08:05:39.38 0.3 undecidable manual P 128 24.1536 50 0.25 72
IT.MTCL.HGZ. 2020-07-25T08:05:39.48 0.6 undecidable manual P 342 26.751 50 -0.05 49
IV.RM33.EHZ. 2020-07-25T08:05:39.75 0.3 undecidable manual P 162 29.748 50 -0.25 71
IV.LNSS.HHZ. 2020-07-25T08:05:38.13 0.3 undecidable manual P 196 18.5703 50 -0.14 74
IV.MTRA.EHZ. 2020-07-25T08:05:38.45 0.3 undecidable manual P 92 24.0537 50 -0.67 64
IV.T1299.HNZ. 2020-07-25T08:05:38.68 0.6 undecidable manual P 134 20.6682 50 0.09 50
IV.MC2.EHZ. 2020-07-25T08:05:38.30 0.1 undecidable manual P 24 17.7711 50 0.15 99
IV.NRCA.HNZ. 2020-07-25T08:05:38.59 0.3 undecidable manual S 8 7.7811 145 -0.05 77
IV.MMO1.EHZ. 2020-07-25T08:05:38.71 0.1 undecidable manual P 51 23.6541 50 -0.34 94
IV.FEMA.HNZ. 2020-07-25T08:05:37.27 1.0 undecidable manual P 349 22.3554 50 -1.58 13
IV.NRCA.HNZ. 2020-07-25T08:05:36.83 0.1 undecidable manual P 8 7.7811 145 0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.8 0.0009923551 0.16 AML other m 2020-07-25T08:05:38.80
IV.NRCA.HHN. ML:1.4 0.00033600595 0.0832 AML other m 2020-07-25T08:05:39.14
IV.NRCA.HNE. ML:1.8 0.00090537955 0.16 AML other m 2020-07-25T08:05:38.81
IV.NRCA.HNN. ML:1.3 0.00028443215 0.0768 AML other m 2020-07-25T08:05:39.15
IV.LNSS.HHE. ML:1.4 0.00018561075 0.1408 AML other m 2020-07-25T08:05:41.33
IV.LNSS.HHN. ML:1.4 0.0001822515 0.2048 AML other m 2020-07-25T08:05:41.37
IV.LNSS.HNE. ML:1.4 0.00020102340000000002 0.1536 AML other m 2020-07-25T08:05:41.33
IV.LNSS.HNN. ML:1.3 0.00016708144999999999 0.1984 AML other m 2020-07-25T08:05:41.37
IV.MTRA.EHE. ML:1.1 0.00007292153 0.2624 AML other m 2020-07-25T08:05:43.85
IV.MTRA.EHN. ML:0.9 0.000048783135 0.1216 AML other m 2020-07-25T08:05:43.80
IV.MTRA.HNE. ML:1.0 0.00006260189500000001 0.1664 AML other m 2020-07-25T08:05:43.85
IV.MTRA.HNN. ML:1.1 0.000074966805 0.0128 AML other m 2020-07-25T08:05:43.93
IV.SMA1.EHE. ML:0.8 0.000041180325000000005 0.1792 AML other m 2020-07-25T08:05:44.90
IV.SMA1.EHN. ML:0.8 0.00003502093 0.1792 AML other m 2020-07-25T08:05:45.26
IV.RM33.EHE. ML:0.8 0.00002908706 0.224 AML other m 2020-07-25T08:05:45.98
IV.RM33.EHN. ML:0.7 0.000024587995 0.1024 AML other m 2020-07-25T08:05:45.44
IV.FDMO.HHE. ML:0.6 0.000020707725 0.2176 AML other m 2020-07-25T08:05:45.02
IV.FDMO.HHN. ML:0.9 0.000034733894 0.1216 AML other m 2020-07-25T08:05:45.07
IV.CSP1.EHE. ML:1.0 0.0000328275435 0.2624 AML other m 2020-07-25T08:05:47.64
IV.TERO.HHE. ML:0.8 0.000017545035 0.096 AML other m 2020-07-25T08:05:49.08
IV.TERO.HHN. ML:0.9 0.000023125185 0.0768 AML other m 2020-07-25T08:05:48.80
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