Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 22-03-2017 and time 13:21:43 (Italy) in region 5 km E Norcia (PG)

A magnitude ML 1.2 earthquake occured in region: 5 km E Norcia (PG), on

  • 22-03-2017 12:21:43 (UTC)
  • 22-03-2017 13:21:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7960, 13.1540 at 3 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 5 4957 4957
Castelsantangelo sul Nera MC 11 281 5238
Arquata del Tronto AP 12 1178 6416
Preci PG 13 724 7140
Accumoli RI 14 667 7807
Cascia PG 14 3217 11024
Montegallo AP 16 523 11547
Visso MC 16 1107 12654
Ussita MC 17 444 13098
Montemonaco AP 18 604 13702
Cerreto di Spoleto PG 20 1075 14777
Cittareale RI 20 482 15259

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Foligno (57155 inhabitants)
48 Km W of Teramo (54892 inhabitants)
49 Km NE of Terni (111501 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
71 Km E of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
94 Km W of Pescara (121014 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km E of Viterbo (67173 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km NW of Chieti (51815 inhabitants)
97 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 1.2 2017-03-22
12:21:43		 42.796 13.1543 3 2017-03-22
12:28:13		 Sala Sismica INGV-Roma 42783071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-03-22 12:21:43 ± 0.08
Latitude 42.7960 ± 0.0036
Longitude 13.1543 ± 0.0061
Depth (km) 3 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 42783071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 530
Semi-minor axis of confidence ellipse (meter) 390
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 269
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.54139
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.6
Num. used stations 2
Type of magnitude ML
Reference to an origin 42783071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-03-22 12:28:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATCC.EHZ. 2017-03-22T12:22:00.76 3.0 undecidable manual S 316 60.0954 50 -3.13 0
IV.FDMO.HHZ. 2017-03-22T12:21:55.78 3.0 undecidable manual S 348 27.2505 96 2.72 0
IV.ATCC.EHZ. 2017-03-22T12:21:55.87 0.1 undecidable manual P 316 60.0954 50 0.57 83
IV.T1219.EHZ. 2017-03-22T12:21:54.11 0.6 undecidable manual S 337 31.2465 95 -0.35 46
IV.T1299.EHZ. 2017-03-22T12:21:51.33 0.6 undecidable manual S 150 20.7681 98 0.5 46
IV.MMO1.EHZ. 2017-03-22T12:21:50.02 0.6 undecidable manual S 51 18.0708 99 0.09 50
IV.T1219.EHZ. 2017-03-22T12:21:49.44 0.1 undecidable manual P 337 31.2465 95 -0.42 92
IV.FDMO.HHZ. 2017-03-22T12:21:49.25 0.1 undecidable manual P 348 27.2505 96 0.2 97
IV.T1218.EHZ. 2017-03-22T12:21:48.58 0.6 undecidable manual S 193 14.3745 101 -0.06 51
IV.T1241.EHZ. 2017-03-22T12:21:48.32 1.0 undecidable manual P 73 23.4543 97 0.01 25
IV.T1299.EHZ. 2017-03-22T12:21:47.64 1.0 positive manual P 150 20.7681 98 -0.12 25
IV.T1212.EHZ. 2017-03-22T12:21:47.44 0.6 undecidable manual S 241 10.1787 105 0.2 50
IV.SEF1.HNZ. 2017-03-22T12:21:47.10 3.0 undecidable manual P 0.2 0
IV.T1218.EHZ. 2017-03-22T12:21:46.18 0.6 positive manual P 193 14.3745 101 -0.31 48
IV.T1245.HHZ. 2017-03-22T12:21:46.48 0.3 undecidable manual S 22 7.2927 111 0.22 75
IV.MMO1.EHZ. 2017-03-22T12:21:46.96 0.6 positive manual P 51 18.0708 99 -0.28 48
IV.T1245.HHZ. 2017-03-22T12:21:45.06 0.6 positive manual P 22 7.2927 111 -0.06 51
IV.T1212.EHZ. 2017-03-22T12:21:45.54 0.6 positive manual P 241 10.1787 105 -0.15 50
IV.T1214.EHZ. 2017-03-22T12:21:45.83 0.6 undecidable manual S 132 5.994 115 -0.03 52
IV.T1214.EHZ. 2017-03-22T12:21:44.68 0.1 undecidable manual P 132 5.994 115 -0.21 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHE. ML:1.8 0.0001315 0.06 AML other m 2017-03-22T12:21:59.49
IV.ATCC.EHN. ML:1.6 0.0000833 0.04 AML other m 2017-03-22T12:22:01.39
IV.FDMO.HHN. ML:0.7 0.0000309 1.68 AML other m 2017-03-22T12:21:55.12
IV.FDMO.HHE. ML:0.6 0.0000244 0.1 AML other m 2017-03-22T12:21:55.92
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