ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 1.2 on date 20-03-2019 and time 00:20:29 (UTC) in region 3 km SW Accumoli (RI)

A magnitude ML 1.2 earthquake occured in region: 3 km SW Accumoli (RI), on

  • 20-03-2019 00:20:29 (UTC)
  • 20-03-2019 01:20:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.67, 13.23 at 11 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.

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 3 667 667
Amatrice RI 6 2657 3324
Cittareale RI 8 482 3806
Arquata del Tronto AP 13 1178 4984
Montereale AQ 16 2581 7565
Campotosto AQ 17 542 8107
Capitignano AQ 18 665 8772
Norcia PG 18 4957 13729
Acquasanta Terme AP 18 2916 16645
Cascia PG 19 3217 19862
Borbona RI 19 617 20479
Posta RI 20 694 21173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km NW of L'Aquila (69753 inhabitants)
39 Km W of Teramo (54892 inhabitants)
49 Km E of Terni (111501 inhabitants)
54 Km SE of Foligno (57155 inhabitants)
77 Km W of Montesilvano (53738 inhabitants)
84 Km W of Pescara (121014 inhabitants)
84 Km SE of Perugia (166134 inhabitants)
85 Km W of Chieti (51815 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
96 Km E of Viterbo (67173 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.2 2019-03-20
00:20:29
42.67 13.23 11 2019-03-20
00:33:53
Sala Sismica INGV-Roma 66696411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-20 00:20:29 ± 0.09
Latitude 42.67 ± 0.01
Longitude 13.23 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 66696411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 528
Semi-minor axis of confidence ellipse (meter) 522
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 180
Circular confidence region, given by single value of horizontal uncertainty (meter) 530
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 60
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.35883
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 66696411
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-20 00:33:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MURB.HHZ. 2019-03-20T00:20:56.73 3.0 undecidable manual S -0.58 0
IV.MF5.EHZ. 2019-03-20T00:20:44.00 0.3 undecidable manual S 28 0.3588 50 0.92 56
IV.TERO.HHZ. 2019-03-20T00:20:40.10 0.3 undecidable manual S 100 0.2779 50 -0.57 65
IV.GAVE.EHZ. 2019-03-20T00:20:39.85 0.3 undecidable manual S 275 0.2491 50 0.02 75
IV.MMO1.EHE. 2019-03-20T00:20:39.40 0.3 undecidable manual S 17 0.2401 50 -0.15 73
IV.MC2.EHZ. 2019-03-20T00:20:37.35 3.0 undecidable manual P 2.07 0
IV.CAMP.HHE. 2019-03-20T00:20:37.60 0.3 undecidable manual S 136 0.1871 117 -0.35 71
IV.RM33.EHZ. 2019-03-20T00:20:37.05 0.3 undecidable manual S 185 0.161 121 -0.03 76
IV.MF5.EHZ. 2019-03-20T00:20:37.94 0.3 undecidable manual P 28 0.3588 50 0.44 67
IV.NRCA.HHZ. 2019-03-20T00:20:37.32 0.3 undecidable manual S 332 0.1853 117 -0.56 67
IV.MTRA.EHZ. 2019-03-20T00:20:36.32 0.3 undecidable manual S 54 0.1493 123 -0.36 71
IV.LNSS.HHZ. 2019-03-20T00:20:36.86 0.6 undecidable manual S 245 0.1556 121 -0.05 50
IV.MMO1.EHE. 2019-03-20T00:20:36.46 1.0 undecidable manual P 17 0.2401 50 1 18
IV.GAVE.EHZ. 2019-03-20T00:20:35.44 0.3 undecidable manual P 275 0.2491 50 -0.18 72
IV.TERO.HHZ. 2019-03-20T00:20:35.81 0.1 undecidable manual P 100 0.2779 50 -0.3 94
IV.SMA1.EHZ. 2019-03-20T00:20:35.07 0.3 undecidable manual S 117 0.0854 138 0.27 73
IV.RM33.EHZ. 2019-03-20T00:20:34.23 1.0 undecidable manual P 185 0.161 121 0.19 24
IV.NRCA.HHZ. 2019-03-20T00:20:34.36 0.1 positive manual P 332 0.1853 117 -0.14 99
IV.CAMP.HHE. 2019-03-20T00:20:34.49 0.3 undecidable manual P 136 0.1871 117 -0.05 75
IV.T1299.EHE. 2019-03-20T00:20:34.18 0.3 undecidable manual S 134 0.0513 152 0.15 76
IV.LNSS.HHZ. 2019-03-20T00:20:34.03 0.1 positive manual P 245 0.1556 121 0.1 100
IV.SMA1.EHZ. 2019-03-20T00:20:33.03 0.3 positive manual P 117 0.0854 138 0.31 73
IV.MTRA.EHZ. 2019-03-20T00:20:33.79 0.6 positive manual P 54 0.1493 123 -0.01 51
IV.T1299.EHE. 2019-03-20T00:20:32.60 0.1 undecidable manual P 134 0.0513 152 0.32 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.6 0.0005115311 0.14 AML other m 2019-03-20T00:20:35.55
IV.SMA1.EHN. ML:1.4 0.000319338 0.12 AML other m 2019-03-20T00:20:35.60
IV.MTRA.HNE. ML:1.2 0.0001272471 0.09 AML other m 2019-03-20T00:20:37.19
IV.MTRA.HNN. ML:1.4 0.0001940510475 0.13 AML other m 2019-03-20T00:20:36.47
IV.MTRA.EHE. ML:1.1 0.000103417335 0.06 AML other m 2019-03-20T00:20:36.42
IV.MTRA.EHN. ML:1.4 0.00019535915 0.14 AML other m 2019-03-20T00:20:36.47
IV.LNSS.HHE. ML:1.1 9.2583065E-5 0.12 AML other m 2019-03-20T00:20:37.87
IV.LNSS.HHN. ML:1 8.7620455E-5 0.18 AML other m 2019-03-20T00:20:37.18
IV.RM33.EHE. ML:0.7 4.069474E-5 0.22 AML other m 2019-03-20T00:20:38.59
IV.RM33.EHN. ML:0.5 2.6163121E-5 0.16 AML other m 2019-03-20T00:20:37.84
IV.NRCA.HNE. ML:1.5 0.000211318365 0.1 AML other m 2019-03-20T00:20:37.69
IV.NRCA.HNN. ML:1.4 0.000183252405 0.11 AML other m 2019-03-20T00:20:37.58
IV.NRCA.HHE. ML:1.5 0.00020576795 0.08 AML other m 2019-03-20T00:20:37.68
IV.NRCA.HHN. ML:1.4 0.00019945545 0.12 AML other m 2019-03-20T00:20:37.52
IV.GAVE.EHE. ML:1.1 6.8162785E-5 0.18 AML other m 2019-03-20T00:20:40.39
IV.GAVE.EHN. ML:1 4.77261E-5 0.26 AML other m 2019-03-20T00:20:42.22
IV.TERO.HHE. ML:0.6 1.8821915E-5 0.08 AML other m 2019-03-20T00:20:40.95
IV.TERO.HHN. ML:0.7 2.3304045E-5 0.08 AML other m 2019-03-20T00:20:41.23
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download