Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 22-03-2017 and time 00:44:38 (Italy) in region 4 km W Accumoli (RI)

A magnitude ML 1.8 earthquake occured in region: 4 km W Accumoli (RI), on

  • 21-03-2017 23:44:38 (UTC)
  • 22-03-2017 00:44:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6790, 13.2020 at 13 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
Accumoli RI 4 667 667
Cittareale RI 8 482 1149
Amatrice RI 9 2657 3806
Arquata del Tronto AP 13 1178 4984
Norcia PG 15 4957 9941
Cascia PG 16 3217 13158
Montereale AQ 18 2581 15739
Posta RI 19 694 16433
Borbona RI 19 617 17050
Campotosto AQ 19 542 17592
Capitignano AQ 19 665 18257
Acquasanta Terme AP 20 2916 21173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NW of L'Aquila (69753 inhabitants)
41 Km W of Teramo (54892 inhabitants)
47 Km E of Terni (111501 inhabitants)
51 Km SE of Foligno (57155 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
82 Km SE of Perugia (166134 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
86 Km W of Pescara (121014 inhabitants)
87 Km W of Chieti (51815 inhabitants)
94 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
Reviewed
Rev100 		ML 1.8 2017-03-21
23:44:38		 42.6793 13.2017 13 2017-03-21
23:52:37		 Sala Sismica INGV-Roma 42760391
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-03-21 23:44:38 ± 0.06
Latitude 42.6793 ± 0.0027
Longitude 13.2017 ± 0.0049
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 42760391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 349
Semi-minor axis of confidence ellipse (meter) 90
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 79
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 57
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.43797
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 21
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.0
Num. used stations 1
Type of magnitude ML
Reference to an origin 42760391
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-03-21 23:52:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T1220.EHZ. 2017-03-21T23:44:54.45 0.3 undecidable manual S 349 48.618 93 0.52 63
IV.T1219.EHZ. 2017-03-21T23:44:53.06 3.0 undecidable manual S -0.28 0
IV.FDMO.HHZ. 2017-03-21T23:44:51.85 0.6 undecidable manual S 347 40.7259 94 0.04 47
IV.TERO.HHZ. 2017-03-21T23:44:49.39 0.6 undecidable manual S 101 33.4443 95 -0.48 42
IV.T1211.EHZ. 2017-03-21T23:44:49.63 0.3 undecidable manual S 240 32.6451 95 -0.03 72
IV.T1216.EHZ. 2017-03-21T23:44:48.20 0.6 undecidable manual S 328 27.75 97 -0.17 47
IV.MC2.EHZ. 2017-03-21T23:44:48.28 0.3 undecidable manual S 358 25.752 98 0.44 67
IV.T1220.EHZ. 2017-03-21T23:44:47.36 0.6 positive manual P 349 48.618 93 -0.04 46
IV.T1241.EHZ. 2017-03-21T23:44:47.80 0.6 undecidable manual S 44 27.0507 97 -0.4 44
IV.RM33.EHZ. 2017-03-21T23:44:46.22 0.3 undecidable manual S 177 18.9699 105 0.16 72
IV.T1217.EHZ. 2017-03-21T23:44:46.75 0.6 undecidable manual S 279 22.3554 101 -0.19 47
IV.FDMO.HHZ. 2017-03-21T23:44:46.07 0.6 negative manual P 347 40.7259 94 -0.1 46
IV.GUMA.HHZ. 2017-03-21T23:44:46.94 0.6 positive manual P 14 43.9227 93 0.27 45
IV.T1245.HHZ. 2017-03-21T23:44:46.22 0.3 undecidable manual S 357 19.6692 104 -0.03 73
IV.ARRO.EHZ. 2017-03-21T23:44:45.67 0.6 negative manual P 253 37.2294 94 0.02 47
IV.T1256.HHZ. 2017-03-21T23:44:45.53 1.0 undecidable manual P 3 36.3414 94 0.03 24
IV.GIGS.HHZ. 2017-03-21T23:44:45.95 1.0 undecidable manual P 129 39.3273 94 -0.02 23
IV.T1222.EHZ. 2017-03-21T23:44:45.08 0.6 positive manual P 204 33.6441 95 -0.02 48
IV.SMA1.EHZ. 2017-03-21T23:44:44.54 0.6 undecidable manual S 116 12.1767 123 0.14 49
IV.T1211.EHZ. 2017-03-21T23:44:44.45 1.0 negative manual P 240 32.6451 95 -0.48 22
IV.T1216.EHZ. 2017-03-21T23:44:44.20 1.0 undecidable manual P 328 27.75 97 0.01 24
IV.T1212.EHZ. 2017-03-21T23:44:44.67 0.6 undecidable manual S 302 15.0738 114 -0.42 46
IV.TERO.HHZ. 2017-03-21T23:44:44.92 1.0 undecidable manual P 101 33.4443 95 -0.14 23
IV.T1247.HHZ. 2017-03-21T23:44:44.31 0.6 negative manual P 163 27.5502 97 0.16 47
IV.T1299.EHZ. 2017-03-21T23:44:43.46 0.6 undecidable manual S 127 8.2806 138 -0.14 49
IV.T1218.EHZ. 2017-03-21T23:44:43.24 0.6 undecidable manual S 262 7.0929 143 -0.17 49
IV.MC2.EHZ. 2017-03-21T23:44:43.96 0.3 negative manual P 358 25.752 98 0.08 72
IV.T1217.EHZ. 2017-03-21T23:44:43.38 0.6 negative manual P 279 22.3554 101 0.02 49
IV.T1241.EHZ. 2017-03-21T23:44:43.93 0.1 positive manual P 44 27.0507 97 -0.16 93
IV.T1245.HHZ. 2017-03-21T23:44:42.97 0.3 positive manual P 357 19.6692 104 0 73
IV.RM33.EHZ. 2017-03-21T23:44:42.99 1.0 undecidable manual P 177 18.9699 105 0.14 24
IV.SMA1.EHZ. 2017-03-21T23:44:42.18 0.6 positive manual P 116 12.1767 123 0.28 47
IV.T1212.EHZ. 2017-03-21T23:44:42.24 0.1 negative manual P 302 15.0738 114 -0.05 98
IV.T1299.EHZ. 2017-03-21T23:44:41.64 0.1 negative manual P 127 8.2806 138 0.2 96
IV.T1218.EHZ. 2017-03-21T23:44:41.35 1.0 undecidable manual P 262 7.0929 143 0.02 25
IV.T1214.EHZ. 2017-03-21T23:44:41.50 0.1 undecidable manual P 4 8.88 135 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:1.8 0.0005055000000000001 0.1 AML other m 2017-03-21T23:44:46.52
IV.RM33.EHN. ML:1.8 0.0005275 0.88 AML other m 2017-03-21T23:44:46.44
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