Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 31-03-2019 and time 18:03:04 (UTC) in region 5 km SW Accumoli (RI)

A magnitude ML 1.4 earthquake occured in region: 5 km SW Accumoli (RI), on

  • 31-03-2019 18:03:04 (UTC)
  • 31-03-2019 20:03:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6700, 13.2060 at 12 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 5 667 667
Cittareale RI 7 482 1149
Amatrice RI 8 2657 3806
Arquata del Tronto AP 14 1178 4984
Montereale AQ 16 2581 7565
Norcia PG 17 4957 12522
Cascia PG 17 3217 15739
Capitignano AQ 18 665 16404
Campotosto AQ 18 542 16946
Posta RI 18 694 17640
Borbona RI 18 617 18257

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NW of L'Aquila (69753 inhabitants)
41 Km W of Teramo (54892 inhabitants)
47 Km E of Terni (111501 inhabitants)
52 Km SE of Foligno (57155 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
82 Km SE of Perugia (166134 inhabitants)
84 Km NE of Guidonia Montecelio (88673 inhabitants)
85 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
Bulletin
Rev1000 		ML 1.4 2019-03-31
18:03:04		 42.6695 13.2055 12 2019-08-22
08:24:58		 Bollettino Sismico Italiano INGV 68118291
Reviewed
Rev100 		ML 1.4 2019-03-31
18:03:04		 42.6728 13.1987 13 2019-03-31
18:08:44		 Sala Sismica INGV-Roma 67120761
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-31 18:03:04 ± 0.09
Latitude 42.6695 ± 0.0036
Longitude 13.2055 ± 0.0061
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 68118291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 537
Semi-minor axis of confidence ellipse (meter) 171
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.37682
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 25
Type of magnitude ML
Reference to an origin 68118291
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-04-30 10:02:01

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 67120761
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-31 18:08:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2019-03-31T18:03:20.82 3.0 positive manual P -0.2 0
IV.MF5.EHZ. 2019-03-31T18:03:19.34 0.6 undecidable manual S 30 40.9257 93 1.07 34
IV.FDMO.HHZ. 2019-03-31T18:03:18.64 0.6 undecidable manual S 347 41.8248 93 0.13 47
IV.GIGS.HHZ. 2019-03-31T18:03:17.35 0.6 undecidable manual S 129 38.4282 93 -0.25 46
IV.TERO.HHZ. 2019-03-31T18:03:15.85 0.3 undecidable manual S 99 32.9448 94 -0.28 69
IV.MMO1.EHZ. 2019-03-31T18:03:14.69 0.1 undecidable manual S 21 27.3504 95 0.04 99
IV.MC2.EHZ. 2019-03-31T18:03:14.69 0.6 undecidable manual S 357 26.8509 95 0.17 48
IV.MF5.EHZ. 2019-03-31T18:03:13.08 0.1 undecidable manual P 30 40.9257 93 0.47 88
IV.CAMP.HHE. 2019-03-31T18:03:13.30 0.3 undecidable manual S 132 22.2555 98 0 74
IV.GUMA.HHZ. 2019-03-31T18:03:13.63 3.0 undecidable manual P 0.34 0
IV.RM33.EHZ. 2019-03-31T18:03:12.20 0.3 undecidable manual S 178 17.871 104 0.06 75
IV.FDMO.HHZ. 2019-03-31T18:03:12.67 0.1 undecidable manual P 347 41.8248 93 -0.08 96
IV.NRCA.HHZ. 2019-03-31T18:03:12.08 0.3 undecidable manual S 338 19.6692 101 -0.54 68
IV.GIGS.HHZ. 2019-03-31T18:03:11.95 0.6 undecidable manual P 129 38.4282 93 -0.28 46
IV.LNSS.HHZ. 2019-03-31T18:03:11.57 0.3 undecidable manual S 241 15.3735 109 0.06 74
IV.MTRA.EHZ. 2019-03-31T18:03:11.98 0.1 undecidable manual S 58 18.3705 103 -0.29 94
IV.TERO.HHZ. 2019-03-31T18:03:11.25 0.3 undecidable manual P 99 32.9448 94 -0.13 72
IV.SMA1.EHZ. 2019-03-31T18:03:10.75 0.3 undecidable manual S 112 11.4774 123 0.18 75
IV.MMO1.EHZ. 2019-03-31T18:03:10.50 0.1 undecidable manual P 21 27.3504 95 -0.02 99
IV.MC2.EHZ. 2019-03-31T18:03:10.53 0.6 undecidable manual P 357 26.8509 95 0.08 49
IV.GAVE.EHZ. 2019-03-31T18:03:10.07 0.3 undecidable manual P 276 25.5522 96 -0.17 73
IV.MTRA.EHZ. 2019-03-31T18:03:09.10 0.1 undecidable manual P 58 18.3705 103 -0.05 100
IV.CAMP.HHE. 2019-03-31T18:03:09.76 0.3 undecidable manual P 132 22.2555 98 0.02 75
IV.NRCA.HHZ. 2019-03-31T18:03:09.15 0.1 undecidable manual P 338 19.6692 101 -0.2 98
IV.RM33.EHZ. 2019-03-31T18:03:09.19 0.1 undecidable manual P 178 17.871 104 0.12 98
IV.SMA1.EHZ. 2019-03-31T18:03:08.45 0.6 undecidable manual P 112 11.4774 123 0.29 48
IV.LNSS.HHZ. 2019-03-31T18:03:08.72 0.1 undecidable manual P 241 15.3735 109 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.0 0.0002445 0.96 AML other m 2019-03-31T18:03:12.48
IV.NRCA.HHE. ML:0.0 0.0004036237 0.1792 AML other m 2019-03-31T18:03:12.62
IV.SMA1.EHN. ML:1.5 0.00032757 0.2176 AML other m 2019-03-31T18:03:11.32
IV.SMA1.EHE. ML:1.7 0.0005207082000000001 0.2304 AML other m 2019-03-31T18:03:11.39
IV.LNSS.HNE. ML:1.2 0.000136565695 0.1024 AML other m 2019-03-31T18:03:12.45
IV.LNSS.HNN. ML:1.3 0.0001839674 0.2432 AML other m 2019-03-31T18:03:11.74
IV.LNSS.HHE. ML:1.3 0.0001591322 0.128 AML other m 2019-03-31T18:03:12.44
IV.LNSS.HHN. ML:1.3 0.0001554829 0.1408 AML other m 2019-03-31T18:03:11.56
IV.MTRA.HNN. ML:1.5 0.00022214497 0.1408 AML other m 2019-03-31T18:03:12.20
IV.MTRA.EHN. ML:1.4 0.00020511000000000002 0.1408 AML other m 2019-03-31T18:03:12.20
IV.MTRA.EHE. ML:1.5 0.00021769655 0.2688 AML other m 2019-03-31T18:03:12.35
IV.MTRA.HNE. ML:1.5 0.0002394987 0.256 AML other m 2019-03-31T18:03:12.47
IV.NRCA.HNE. ML:1.8 0.00039308125 0.1664 AML other m 2019-03-31T18:03:12.53
IV.RM33.EHN. ML:1.3 0.00014498505 0.1408 AML other m 2019-03-31T18:03:12.40
IV.RM33.HNE. ML:1.3 0.0001384022 0.1408 AML other m 2019-03-31T18:03:12.67
IV.RM33.EHE. ML:1.2 0.00012084809999999999 0.1408 AML other m 2019-03-31T18:03:12.60
IV.TERO.HHN. ML:1.2 0.000058797295 0.064 AML other m 2019-03-31T18:03:16.88
IV.TERO.HHE. ML:1.0 0.00003927578 0.0896 AML other m 2019-03-31T18:03:16.06
IV.GIGS.HHE. ML:0.4 0.0000079742495 0.0896 AML other m 2019-03-31T18:03:19.41
IV.FDMO.HHE. ML:0.8 0.000017698640000000003 0.1792 AML other m 2019-03-31T18:03:21.21
IV.FDMO.HHN. ML:0.7 0.000012816194999999999 0.1408 AML other m 2019-03-31T18:03:19.69
IV.MF5.EHE. ML:1.0 0.000035536224999999995 0.4608 AML other m 2019-03-31T18:03:20.24
IV.GUMA.HHN. ML:1.5 0.00009676829000000001 0.3968 AML other m 2019-03-31T18:03:20.81
IV.GUMA.HNE. ML:1.7 0.000137629665 0.3328 AML other m 2019-03-31T18:03:20.86
IV.GUMA.HHE. ML:1.6 0.00010752573500000002 0.2944 AML other m 2019-03-31T18:03:20.72
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