Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 31-10-2016 and time 04:22:23 (Italy) in region 2 km W Norcia (PG)

A magnitude ML 2.0 earthquake occured in region: 2 km W Norcia (PG), on

  • 31-10-2016 03:22:23 (UTC)
  • 31-10-2016 04:22:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7880, 13.0690 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 2 4957 4957
Cascia PG 9 3217 8174
Preci PG 10 724 8898
Cerreto di Spoleto PG 13 1075 9973
Poggiodomo PG 14 117 10090
Castelsantangelo sul Nera MC 14 281 10371
Visso MC 16 1107 11478
Sellano PG 16 1079 12557
Vallo di Nera PG 17 364 12921
Accumoli RI 18 667 13588
Monteleone di Spoleto PG 18 599 14187
Ussita MC 18 444 14631
Arquata del Tronto AP 19 1178 15809
Sant'Anatolia di Narco PG 20 564 16373

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SE of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
66 Km SE of Perugia (166134 inhabitants)
89 Km E of Viterbo (67173 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
94 Km N of Tivoli (56533 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
Bulletin
Rev1000 		ML 2.0 2016-10-31
03:22:23		 42.7882 13.0687 10 2019-02-12
14:03:14		 Bollettino Sismico Italiano INGV 45035281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-31 03:22:23 ± 0.07
Latitude 42.7882 ± 0.0036
Longitude 13.0687 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 45035281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 440
Semi-minor axis of confidence ellipse (meter) 268
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 4
Circular confidence region, given by single value of horizontal uncertainty (meter) 440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.71586
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 18
Magnitude information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 45035281
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-05-08 18:48:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FIAM.HHZ. 2016-10-31T03:22:42.00 0.6 undecidable manual S 176 57.7977 50 0.47 42
IV.ARVD.HHZ. 2016-10-31T03:22:37.78 0.6 undecidable manual P 353 79.4649 50 0.59 39
IV.T1246.HHN. 2016-10-31T03:22:37.10 0.3 undecidable manual S 123 41.4252 50 -0.04 71
IV.MGAB.HHZ. 2016-10-31T03:22:37.77 0.6 undecidable manual P 280 78.9654 50 0.64 38
IV.T1211.EHZ. 2016-10-31T03:22:34.90 1.0 undecidable manual S 212 33.2445 50 -0.07 24
IV.ARRO.EHZ. 2016-10-31T03:22:34.90 1.0 undecidable manual S 227 33.8439 50 -0.23 23
IV.RM33.EHZ. 2016-10-31T03:22:34.60 0.6 undecidable manual S 159 33.1446 50 -0.35 45
IV.FIAM.HHZ. 2016-10-31T03:22:33.87 0.3 undecidable manual P 176 57.7977 50 0.01 70
IV.T1204.EHZ. 2016-10-31T03:22:32.20 1.0 undecidable manual S 122 23.754 113 -0.12 24
IV.CESX.HHZ. 2016-10-31T03:22:31.35 1.0 undecidable manual P 243 44.0226 50 -0.39 22
IV.LNSS.HHZ. 2016-10-31T03:22:31.20 0.3 undecidable manual S 186 20.6682 116 -0.16 72
IV.T1247.HHZ. 2016-10-31T03:22:31.42 0.3 undecidable manual P 154 42.8238 50 -0.12 70
IV.ASSB.HHZ. 2016-10-31T03:22:31.31 1.0 undecidable manual P 310 43.623 50 -0.37 22
IV.TERO.HHZ. 2016-10-31T03:22:31.99 3.0 undecidable manual S -1.83 0
IV.T1201.HNN. 2016-10-31T03:22:31.80 0.6 undecidable manual S 134 20.7681 116 0.42 46
IV.T1246.HHN. 2016-10-31T03:22:31.06 0.3 undecidable manual P 123 41.4252 50 -0.27 68
IV.ARRO.EHZ. 2016-10-31T03:22:30.06 0.3 undecidable manual P 227 33.8439 50 -0.11 71
IV.T1211.EHZ. 2016-10-31T03:22:30.03 0.3 undecidable manual P 212 33.2445 50 -0.04 72
IV.T1243.HHZ. 2016-10-31T03:22:29.73 0.6 undecidable manual P 108 32.5452 50 -0.24 46
IV.SMA1.EHN. 2016-10-31T03:22:29.64 0.6 undecidable manual P 129 27.9498 50 0.39 45
IV.T1215.HNZ. 2016-10-31T03:22:29.80 0.3 undecidable manual S 275 16.3725 121 -0.23 72
IV.RM33.EHZ. 2016-10-31T03:22:29.99 0.6 undecidable manual P 159 33.1446 50 -0.07 48
IV.T1217.EHZ. 2016-10-31T03:22:29.40 0.6 undecidable manual S 233 13.9749 125 0.04 50
IV.T1204.EHZ. 2016-10-31T03:22:28.56 0.3 undecidable manual P 122 23.754 113 0.01 74
IV.OFFI.HHZ. 2016-10-31T03:22:28.99 3.0 undecidable manual S -0.49 0
IV.T1201.HNN. 2016-10-31T03:22:28.12 0.3 undecidable manual P 134 20.7681 116 0.12 73
IV.T1245.HNZ. 2016-10-31T03:22:28.50 0.6 undecidable manual S 52 12.2766 129 -0.39 47
IV.LNSS.HHZ. 2016-10-31T03:22:28.13 0.3 undecidable manual P 186 20.6682 116 0.14 73
IV.T1215.HNZ. 2016-10-31T03:22:27.24 0.1 undecidable manual P 275 16.3725 121 0.02 100
IV.T1217.EHZ. 2016-10-31T03:22:26.96 0.1 undecidable manual P 233 13.9749 125 0.13 98
IV.T1245.HNZ. 2016-10-31T03:22:26.65 0.6 undecidable manual P 52 12.2766 129 0.09 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
XO.AM05.EHN. ML:1.2 0.00007090675 0.08 AML other m 2016-10-31T03:22:21.33
XO.AM05.EHE. ML:2.3 0.0009918499 0.4608 AML other m 2016-10-31T03:22:21.13
XO.AM05.HNE. ML:1.6 0.00018750545000000002 0.68 AML other m 2016-10-31T03:22:21.07
XO.AM05.HNN. ML:1.7 0.0002251753 0.4384 AML other m 2016-10-31T03:22:21.53
IV.ARRO.EHN. ML:2.2 0.0006995 0.18 AML other m 2016-10-31T03:23:42.16
IV.ARRO.EHE. ML:1.8 0.00023868305 0.2 AML other m 2016-10-31T03:22:35.62
IV.ASSB.HHN. ML:0.0 0.0001920876 0.8 AML other m 2016-10-31T03:22:38.33
IV.ASSB.HHE. ML:2.1 0.000398 0.42 AML other m 2016-10-31T03:23:41.42
IV.CESX.HHE. ML:0.0 0.00016164155 5.04 AML other m 2016-10-31T03:22:42.62
IV.CESX.HHN. ML:2.6 0.00135 0.48 AML other m 2016-10-31T03:23:45.57
IV.GUMA.HHN. ML:2.4 0.00115 0.24 AML other m 2016-10-31T03:22:28.21
IV.GUMA.HNN. ML:2.4 0.0008869632 2.52 AML other m 2016-10-31T03:22:28.20
IV.GUMA.HHE. ML:2.5 0.001195 0.44 AML other m 2016-10-31T03:22:23.50
IV.LNSS.HHE. ML:0.0 0.0007515809500000001 0.4992 AML other m 2016-10-31T03:22:31.73
IV.LNSS.HHN. ML:0.0 0.002561954 0.44 AML other m 2016-10-31T03:22:31.79
IV.RM33.EHE. ML:0.0 0.0002835 1.1 AML other m 2016-10-31T03:22:37.92
IV.RM33.EHN. ML:0.0 0.0003085 0.22 AML other m 2016-10-31T03:22:35.66
IV.SNTG.HHE. ML:1.5 0.0000677 1.14 AML other m 2016-10-31T03:22:41.90
IV.T1211.EHN. ML:2.2 0.00060950265 0.24 AML other m 2016-10-31T03:22:35.29
IV.T1211.HNE. ML:0.0 0.00032527625 0.368 AML other m 2016-10-31T03:22:35.38
IV.T1211.HNN. ML:0.0 0.0006150657 0.24 AML other m 2016-10-31T03:22:35.41
IV.T1215.HNE. ML:0.0 0.00066417815 0.928 AML other m 2016-10-31T03:22:29.94
IV.T1215.HNN. ML:2.0 0.00688 0.76 AML other m 2016-10-31T03:23:34.07
IV.T1215.EHE. ML:1.9 0.003165 0.68 AML other m 2016-10-31T03:23:35.03
IV.T1215.EHN. ML:2.0 0.007045 0.78 AML other m 2016-10-31T03:23:34.46
IV.T1217.HNE. ML:1.8 0.00219 1.1 AML other m 2016-10-31T03:23:34.88
IV.T1217.EHE. ML:0.0 0.000717592 0.24 AML other m 2016-10-31T03:22:30.75
IV.T1217.HNN. ML:0.0 0.0011319095 1.44 AML other m 2016-10-31T03:22:29.77
IV.T1217.EHN. ML:0.0 0.0010446666499999999 1.392 AML other m 2016-10-31T03:22:29.68
IV.T1247.HHN. ML:0.0 0.0002499043 1.84 AML other m 2016-10-31T03:22:38.76
IV.T1247.HHE. ML:2.0 0.0002825 0.74 AML other m 2016-10-31T03:23:39.59
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
Waveforms Seismic signals in miniseed + resp format Download