Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 28-12-2017 and time 23:19:33 (Italy) in region 6 km NW Accumoli (RI)

A magnitude ML 2.1 earthquake occured in region: 6 km NW Accumoli (RI), on

  • 28-12-2017 22:19:33 (UTC)
  • 28-12-2017 23:19:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7250, 13.1930 at 9 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.

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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
Accumoli RI 6 667 667
Arquata del Tronto AP 10 1178 1845
Norcia PG 11 4957 6802
Cittareale RI 12 482 7284
Amatrice RI 13 2657 9941
Cascia PG 15 3217 13158
Montegallo AP 18 523 13681
Acquasanta Terme AP 19 2916 16597
Castelsantangelo sul Nera MC 19 281 16878

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
45 Km NW of L'Aquila (69753 inhabitants)
47 Km SE of Foligno (57155 inhabitants)
48 Km E of Terni (111501 inhabitants)
78 Km SE of Perugia (166134 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
89 Km W of Pescara (121014 inhabitants)
89 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km W of Chieti (51815 inhabitants)
91 Km NE of Tivoli (56533 inhabitants)
95 Km E of Viterbo (67173 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 2.1 2017-12-28
22:19:33		 42.7247 13.1928 9 2018-09-04
09:10:42		 Bollettino Sismico Italiano INGV 55442251
Reviewed
Rev100 		ML 2.1 2017-12-28
22:19:33		 42.7232 13.1883 9 2017-12-28
22:28:32		 Sala Sismica INGV-Roma 52880141
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-12-28 22:19:33 ± 0.05
Latitude 42.7247 ± 0.0027
Longitude 13.1928 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 55442251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 423
Semi-minor axis of confidence ellipse (meter) 88
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 72
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 44
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.78601
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 55442251
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-04-11 14:18:32

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 52880141
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-12-28 22:28:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T0110.HHZ. 2017-12-28T22:19:56.53 0.3 undecidable manual S 139 72.7716 50 0.64 57
IV.EL6.EHZ. 2017-12-28T22:19:54.63 0.1 undecidable manual S 354 67.4769 50 0.16 87
IV.MOMA.HHZ. 2017-12-28T22:19:50.75 0.1 undecidable manual S 280 51.5151 50 0.55 82
MN.AQU.HHE. 2017-12-28T22:19:48.38 0.3 undecidable manual S 157 44.622 50 0.01 70
IV.ATFO.HHZ. 2017-12-28T22:19:48.78 0.3 undecidable manual P 325 87.246 50 0.12 63
IV.CSP1.EHZ. 2017-12-28T22:19:47.05 0.1 undecidable manual S 1 40.7259 50 -0.29 89
IV.GUMA.HHZ. 2017-12-28T22:19:47.36 0.3 undecidable manual S 17 39.2274 50 0.42 65
IV.T0110.HHZ. 2017-12-28T22:19:46.28 0.1 undecidable manual P 139 72.7716 50 -0.16 86
IV.MF5.EHZ. 2017-12-28T22:19:46.50 0.1 undecidable manual S 37 36.3414 50 0.33 89
IV.ARRO.EHZ. 2017-12-28T22:19:46.40 0.3 undecidable manual S 245 38.4282 50 -0.32 67
IV.EL6.EHZ. 2017-12-28T22:19:45.41 0.1 undecidable manual P 354 67.4769 50 -0.21 86
IV.FDMO.HHZ. 2017-12-28T22:19:45.57 0.3 undecidable manual S 346 35.6421 50 -0.41 66
IV.TERO.HHZ. 2017-12-28T22:19:45.40 0.1 undecidable manual S 108 35.3424 50 -0.51 85
IV.T1247.HHZ. 2017-12-28T22:19:44.81 0.1 undecidable manual S 165 32.5452 50 -0.34 89
IV.ASSB.HHZ. 2017-12-28T22:19:43.57 3.0 positive manual P -0.22 0
IV.MOMA.HHZ. 2017-12-28T22:19:43.00 0.3 negative manual P 280 51.5151 50 -0.15 67
IV.FEMA.HNE. 2017-12-28T22:19:43.70 0.1 undecidable manual S 336 28.749 107 -0.28 91
IV.CAMP.HHZ. 2017-12-28T22:19:43.00 0.1 undecidable manual S 140 27.3504 108 -0.52 86
IV.OFFI.HHZ. 2017-12-28T22:19:43.03 0.1 undecidable manual P 60 46.4202 50 0.66 79
IV.RM33.EHZ. 2017-12-28T22:19:42.26 0.1 undecidable manual S 176 23.9538 110 -0.15 94
OB.GAVE.EHZ. 2017-12-28T22:19:42.42 3.0 undecidable manual S -0.04 0
MN.AQU.HHE. 2017-12-28T22:19:42.66 0.6 undecidable manual P 157 44.622 50 0.56 41
IV.CSP1.EHZ. 2017-12-28T22:19:41.20 1.0 undecidable manual P 1 40.7259 50 -0.3 22
IV.ARRO.EHZ. 2017-12-28T22:19:41.28 0.1 undecidable manual P 245 38.4282 50 0.14 92
IV.GUMA.HHZ. 2017-12-28T22:19:41.35 0.1 positive manual P 17 39.2274 50 0.08 93
IV.MC2.EHZ. 2017-12-28T22:19:41.60 0.1 undecidable manual S 359 20.6682 113 0.25 93
IV.MF5.EHZ. 2017-12-28T22:19:41.08 0.6 negative manual P 37 36.3414 50 0.25 45
IV.MMO1.EHZ. 2017-12-28T22:19:41.55 0.1 undecidable manual S 29 22.2555 112 -0.29 92
IV.SMA1.EHZ. 2017-12-28T22:19:40.00 0.1 undecidable manual S 132 15.6732 120 0.23 94
IV.TERO.HHZ. 2017-12-28T22:19:40.19 0.3 negative manual P 108 35.3424 50 -0.49 65
IV.T1247.HHZ. 2017-12-28T22:19:40.11 0.1 undecidable manual P 165 32.5452 50 -0.13 93
IV.FDMO.HHZ. 2017-12-28T22:19:40.43 1.0 positive manual P 346 35.6421 50 -0.28 22
IV.CAMP.HHZ. 2017-12-28T22:19:39.02 0.1 undecidable manual P 140 27.3504 108 -0.27 91
IV.MTRA.HNZ. 2017-12-28T22:19:39.96 0.1 undecidable manual S 78 16.9719 118 -0.21 94
IV.T1299.EHZ. 2017-12-28T22:19:39.27 0.1 undecidable manual S 144 12.3765 126 0.45 90
IV.FEMA.HNE. 2017-12-28T22:19:39.36 0.3 undecidable manual P 336 28.749 107 -0.2 69
IV.MC2.EHZ. 2017-12-28T22:19:38.17 0.1 undecidable manual P 359 20.6682 113 0.13 95
IV.MMO1.EHZ. 2017-12-28T22:19:38.27 0.1 undecidable manual P 29 22.2555 112 -0.05 97
IV.RM33.EHZ. 2017-12-28T22:19:38.61 0.1 positive manual P 176 23.9538 110 -0.04 96
IV.NRCA.HNZ. 2017-12-28T22:19:38.88 0.1 undecidable manual S 332 13.6752 123 -0.3 93
OB.GAVE.EHZ. 2017-12-28T22:19:38.78 3.0 negative manual P 0.1 0
IV.T1299.EHZ. 2017-12-28T22:19:37.04 0.1 negative manual P 144 12.3765 126 0.46 90
IV.SMA1.EHZ. 2017-12-28T22:19:37.34 0.1 negative manual P 132 15.6732 120 0.22 94
IV.MTRA.HNZ. 2017-12-28T22:19:37.40 0.1 negative manual P 78 16.9719 118 0.04 98
IV.NRCA.HNZ. 2017-12-28T22:19:36.92 0.1 undecidable manual P 332 13.6752 123 0.13 96
IV.T1214.EHZ. 2017-12-28T22:19:36.95 0.1 undecidable manual S 19 4.0959 155 0.03 100
IV.T1214.EHZ. 2017-12-28T22:19:35.74 1.0 undecidable manual P 19 4.0959 155 0.26 24
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:2.1 0.00145 0.16 AML other m 2017-12-28T22:19:39.24
IV.NRCA.HHN. ML:2.2 0.0015550000000000002 0.16 AML other m 2017-12-28T22:19:39.24
IV.T1299.EHE. ML:2.0 0.0011425 0.92 AML other m 2017-12-28T22:19:39.53
IV.T1299.EHN. ML:2.0 0.0011 1.48 AML other m 2017-12-28T22:19:39.16
IV.MTRA.HNN. ML:2.3 0.0017250000000000002 1.1 AML other m 2017-12-28T22:19:40.82
IV.MTRA.EHN. ML:2.3 0.0017900000000000001 0.56 AML other m 2017-12-28T22:19:40.83
IV.MTRA.HNE. ML:2.4 0.0020150000000000003 1.12 AML other m 2017-12-28T22:19:40.23
IV.MTRA.EHE. ML:2.4 0.002 1.14 AML other m 2017-12-28T22:19:40.23
IV.RM33.HNN. ML:1.9 0.0005434999999999999 0.78 AML other m 2017-12-28T22:19:43.17
IV.RM33.EHN. ML:1.9 0.0005344999999999999 1.58 AML other m 2017-12-28T22:19:43.17
IV.RM33.HNE. ML:2.0 0.0006129999999999999 0.8 AML other m 2017-12-28T22:19:43.26
IV.RM33.EHE. ML:2.0 0.000631 0.8 AML other m 2017-12-28T22:19:43.27
IV.NRCA.HHE. ML:2.2 0.0015699999999999998 1.18 AML other m 2017-12-28T22:19:43.12
IV.NRCA.HNE. ML:2.1 0.00146 1.18 AML other m 2017-12-28T22:19:43.12
IV.SMA1.EHE. ML:2.2 0.0014849999999999998 0.34 AML other m 2017-12-28T22:19:43.80
IV.SMA1.EHN. ML:2.2 0.001485 0.48 AML other m 2017-12-28T22:19:44.73
IV.TERO.HNN. ML:1.8 0.0002415 0.6 AML other m 2017-12-28T22:19:45.76
IV.TERO.HHN. ML:2.0 0.00044200000000000006 0.6 AML other m 2017-12-28T22:19:45.76
IV.FDMO.HHN. ML:1.9 0.0003325 1.08 AML other m 2017-12-28T22:19:45.86
IV.TERO.HNE. ML:1.8 0.0002595 1.18 AML other m 2017-12-28T22:19:46.15
IV.TERO.HHE. ML:2.0 0.0004255 1.2 AML other m 2017-12-28T22:19:46.75
IV.FDMO.HHE. ML:1.9 0.000297 0.24 AML other m 2017-12-28T22:19:48.60
IV.GUMA.HHN. ML:2.4 0.0007985 0.68 AML other m 2017-12-28T22:19:48.90
IV.MF5.EHN. ML:2.0 0.0003565 0.48 AML other m 2017-12-28T22:19:49.69
IV.MF5.EHE. ML:1.9 0.000328 0.82 AML other m 2017-12-28T22:19:50.51
IV.OFFI.HHN. ML:2.4 0.0007765 0.56 AML other m 2017-12-28T22:19:51.42
IV.MOMA.HHE. ML:2.2 0.0003785 0.16 AML other m 2017-12-28T22:19:51.26
IV.OFFI.HHE. ML:2.3 0.0005755000000000001 1.36 AML other m 2017-12-28T22:19:52.25
IV.MOMA.HHN. ML:2.0 0.0002475 0.92 AML other m 2017-12-28T22:19:53.51
IV.ASSB.HHE. ML:1.9 0.0001747 0.54 AML other m 2017-12-28T22:19:53.25
IV.GUMA.HHE. ML:2.3 0.000651 0.46 AML other m 2017-12-28T22:19:53.42
IV.ASSB.HHN. ML:1.8 0.0001385 0.96 AML other m 2017-12-28T22:19:53.50
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