Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 26-01-2017 and time 21:46:48 (Italy) in region 3 km SW Norcia (PG)

A magnitude ML 1.5 earthquake occured in region: 3 km SW Norcia (PG), on

  • 26-01-2017 20:46:48 (UTC)
  • 26-01-2017 21:46:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7730, 13.0660 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 3 4957 4957
Cascia PG 7 3217 8174
Preci PG 12 724 8898
Poggiodomo PG 13 117 9015
Cerreto di Spoleto PG 13 1075 10090
Castelsantangelo sul Nera MC 15 281 10371
Monteleone di Spoleto PG 16 599 10970
Vallo di Nera PG 17 364 11334
Accumoli RI 17 667 12001
Sellano PG 17 1079 13080
Visso MC 18 1107 14187
Cittareale RI 19 482 14669
Arquata del Tronto AP 19 1178 15847
Sant'Anatolia di Narco PG 19 564 16411
Ussita MC 20 444 16855

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SE of Foligno (57155 inhabitants)
42 Km NE of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
88 Km E of Viterbo (67173 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km N of Tivoli (56533 inhabitants)
93 Km W of Montesilvano (53738 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 1.5 2017-01-26
20:46:48		 42.7727 13.0662 11 2017-01-26
20:53:06		 Sala Sismica INGV-Roma 39860661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-01-26 20:46:48 ± 0.04
Latitude 42.7727 ± 0.0018
Longitude 13.0662 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 39860661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 272
Semi-minor axis of confidence ellipse (meter) 207
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 295
Circular confidence region, given by single value of horizontal uncertainty (meter) 270.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 64
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.42268
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 39860661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-01-26 20:53:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LAV9.HHZ. 2017-01-26T20:47:23.99 3.0 undecidable manual S -2.5 0
IV.TERO.HHZ. 2017-01-26T20:47:03.75 0.6 undecidable manual S 111 46.9197 50 -0.19 46
IV.GUMA.HHZ. 2017-01-26T20:47:02.27 0.6 undecidable manual S 34 38.9277 50 0.47 44
IV.T1220.EHZ. 2017-01-26T20:47:01.28 0.6 undecidable manual S 3 37.4292 50 -0.14 47
IV.RM33.EHZ. 2017-01-26T20:46:59.73 0.6 undecidable manual S 157 31.6461 50 -0.15 47
IV.TERO.HHZ. 2017-01-26T20:46:57.38 0.3 undecidable manual P 111 46.9197 50 -0.17 69
IV.ASSB.HHZ. 2017-01-26T20:46:57.03 0.1 undecidable manual P 312 44.622 50 -0.18 92
IV.T1220.EHZ. 2017-01-26T20:46:56.05 1.0 positive manual P 3 37.4292 50 -0.06 24
IV.MC2.EHZ. 2017-01-26T20:46:56.28 0.3 undecidable manual S 33 18.3705 120 0.11 73
IV.GUMA.HHZ. 2017-01-26T20:46:56.56 0.6 undecidable manual P 34 38.9277 50 0.24 46
IV.LNSS.HHZ. 2017-01-26T20:46:56.24 0.3 undecidable manual S 186 18.9699 119 -0.11 73
IV.MOMA.HHZ. 2017-01-26T20:46:56.75 0.3 undecidable manual P 275 40.5261 50 0.17 69
IV.T1215.EHZ. 2017-01-26T20:46:55.48 0.3 undecidable manual S 281 16.3725 123 -0.12 73
IV.RM33.EHZ. 2017-01-26T20:46:55.07 0.6 negative manual P 157 31.6461 50 -0.14 47
IV.ARRO.EHZ. 2017-01-26T20:46:55.20 0.3 undecidable manual P 229 32.5452 50 -0.15 71
IV.T1245.HHZ. 2017-01-26T20:46:54.59 0.3 undecidable manual S 47 13.5753 128 -0.2 72
IV.T1218.EHZ. 2017-01-26T20:46:54.50 0.6 undecidable manual S 161 12.0768 131 0.11 49
IV.T1216.EHZ. 2017-01-26T20:46:54.64 0.3 undecidable manual S 344 13.6752 128 -0.17 73
IV.T1217.EHZ. 2017-01-26T20:46:54.55 0.3 undecidable manual S 238 12.876 129 -0.06 75
IV.NRCA.HNZ. 2017-01-26T20:46:53.08 0.1 undecidable manual S 30 7.7811 143 -0.3 95
IV.LNSS.HHZ. 2017-01-26T20:46:53.27 0.6 undecidable manual P 186 18.9699 119 0.09 49
IV.MC2.EHZ. 2017-01-26T20:46:53.16 0.1 positive manual P 33 18.3705 120 0.09 98
IV.T1217.EHZ. 2017-01-26T20:46:52.37 0.3 positive manual P 238 12.876 129 0.2 72
IV.T1245.HHZ. 2017-01-26T20:46:52.39 0.1 positive manual P 47 13.5753 128 0.11 98
IV.T1218.EHZ. 2017-01-26T20:46:52.22 0.6 negative manual P 161 12.0768 131 0.18 49
IV.T1215.EHZ. 2017-01-26T20:46:52.82 0.3 positive manual P 281 16.3725 123 0.08 74
IV.T1212.EHZ. 2017-01-26T20:46:52.58 0.6 undecidable manual S 217 2.8971 164 -0.04 51
IV.T1216.EHZ. 2017-01-26T20:46:52.33 0.3 negative manual P 344 13.6752 128 0.05 75
IV.T1212.EHZ. 2017-01-26T20:46:51.22 0.1 positive manual P 217 2.8971 164 0.2 98
IV.NRCA.HNZ. 2017-01-26T20:46:51.53 0.1 undecidable manual P 30 7.7811 143 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:1.3 0.0000578 0.42 AML other m 2017-01-26T20:47:04.51
IV.ASSB.HHN. ML:1.1 0.000041830000000000004 0.72 AML other m 2017-01-26T20:47:06.61
IV.LNSS.HHN. ML:1.6 0.00028349999999999995 0.68 AML other m 2017-01-26T20:46:56.84
IV.LNSS.HHE. ML:1.6 0.0003115 0.3 AML other m 2017-01-26T20:46:57.19
IV.MOMA.HHN. ML:1.3 0.00007209999999999999 0.82 AML other m 2017-01-26T20:47:03.51
IV.MOMA.HHE. ML:1.4 0.00007855000000000001 0.96 AML other m 2017-01-26T20:47:03.86
IV.RM33.EHN. ML:1.2 0.00007735 0.78 AML other m 2017-01-26T20:47:00.53
IV.RM33.EHE. ML:1.2 0.0000803 0.54 AML other m 2017-01-26T20:47:00.87
IV.T1212.HNN. ML:1.5 0.0006035 0.18 AML other m 2017-01-26T20:46:52.77
IV.T1212.HNE. ML:1.4 0.00048150000000000005 0.6 AML other m 2017-01-26T20:46:52.68
IV.T1212.EHN. ML:1.5 0.000609 0.18 AML other m 2017-01-26T20:46:52.77
IV.T1212.EHE. ML:1.4 0.0004165 0.6 AML other m 2017-01-26T20:46:52.68
IV.T1215.EHN. ML:1.4 0.0002015 0.82 AML other m 2017-01-26T20:46:55.56
IV.T1215.EHE. ML:1.2 0.00013845 0.56 AML other m 2017-01-26T20:46:55.88
IV.T1216.EHE. ML:1.7 0.00045799999999999997 1.34 AML other m 2017-01-26T20:46:54.25
IV.T1216.EHN. ML:1.6 0.000398 0.98 AML other m 2017-01-26T20:46:55.00
IV.T1217.EHE. ML:1.1 0.0001295 0.4 AML other m 2017-01-26T20:46:55.09
IV.T1217.EHN. ML:1.1 0.0001282 0.28 AML other m 2017-01-26T20:46:54.81
IV.T1218.EHE. ML:1.6 0.0004775 0.94 AML other m 2017-01-26T20:46:55.65
IV.T1218.EHN. ML:1.9 0.0008345000000000001 0.22 AML other m 2017-01-26T20:46:54.81
IV.T1245.HHE. ML:1.7 0.0005605 1.06 AML other m 2017-01-26T20:46:55.23
IV.T1245.HNN. ML:1.7 0.0005214999999999999 0.76 AML other m 2017-01-26T20:46:56.51
IV.T1245.HHN. ML:1.6 0.0004385 0.5 AML other m 2017-01-26T20:46:55.04
IV.T1245.HNE. ML:1.7 0.0005155000000000001 1.08 AML other m 2017-01-26T20:46:55.22
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