ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 1.8 on date 23-03-2019 and time 10:33:31 (Italy) in region 8 km W Arquata del Tronto (AP)

A magnitude ML 1.8 earthquake occured in region: 8 km W Arquata del Tronto (AP), on

  • 23-03-2019 09:33:31 (UTC)
  • 23-03-2019 10:33:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.78, 13.2 at 10 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
Arquata del Tronto AP 8 1178 1178
Norcia PG 9 4957 6135
Accumoli RI 10 667 6802
Montegallo AP 13 523 7325
Castelsantangelo sul Nera MC 14 281 7606
Cascia PG 16 3217 10823
Acquasanta Terme AP 17 2916 13739
Montemonaco AP 17 604 14343
Preci PG 18 724 15067
Amatrice RI 18 2657 17724
Cittareale RI 18 482 18206
Ussita MC 20 444 18650
Visso MC 20 1107 19757

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
45 Km E of Foligno (57155 inhabitants)
50 Km NW of L'Aquila (69753 inhabitants)
51 Km E of Terni (111501 inhabitants)
76 Km E of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
90 Km W of Pescara (121014 inhabitants)
92 Km NW of Chieti (51815 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
97 Km S of Ancona (100861 inhabitants)
98 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 1.8 2019-03-23
09:33:31
42.78 13.2 10 2019-03-23
09:50:39
Sala Sismica INGV-Roma 66832781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-23 09:33:31 ± 0.04
Latitude 42.78 ± 0.00
Longitude 13.20 ± 0.00
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 66832781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 302
Semi-minor axis of confidence ellipse (meter) 97
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 88
Circular confidence region, given by single value of horizontal uncertainty (meter) 300
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 63
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.51531
Number of stations at which the event was observed 47
Number of stations from which data was used for origin computation 17
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 34
Type of magnitude ML
Reference to an origin 66832781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-23 09:50:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
CR.STON.BHZ. 2019-03-23T09:35:09.00 3.0 undecidable manual Sg 19.02 0
IV.IFIL.HHZ. 2019-03-23T09:35:04.62 3.0 undecidable manual Sn -5.45 0
IV.EUCT.HNZ. 2019-03-23T09:34:50.76 3.0 undecidable manual Sn -0.02 0
IV.GMB.BHZ. 2019-03-23T09:34:46.00 3.0 undecidable manual Pg 16.299999 0
IV.IMI.HHZ. 2019-03-23T09:34:44.40 3.0 undecidable manual Sn -9.99 0
IV.EPZF.HHZ. 2019-03-23T09:34:28.16 3.0 positive manual Pn -2.14 0
IV.NDIM.HNZ. 2019-03-23T09:34:26.15 3.0 undecidable manual Sg 1.38 0
IV.PTRJ.HNZ. 2019-03-23T09:34:24.11 3.0 undecidable manual Sg 14.89 0
IV.IFIL.HHZ. 2019-03-23T09:34:22.51 3.0 undecidable manual Pn 2.77 0
IV.SPS2.HHZ. 2019-03-23T09:34:15.59 3.0 undecidable manual Pn -3.68 0
IT.PNAL.HNZ. 2019-03-23T09:34:08.47 3.0 undecidable manual Pg 2.18 0
IV.BRMO.HHZ. 2019-03-23T09:34:07.49 3.0 positive manual Pn -8.06 0
IV.CMPR.HHZ. 2019-03-23T09:34:03.83 3.0 undecidable manual Pn 2.29 0
IV.EUCT.HNZ. 2019-03-23T09:34:02.73 3.0 undecidable manual Pn -6.17 0
IV.VTIR.HHZ. 2019-03-23T09:34:02.74 3.0 undecidable manual Pg 11.72 0
IT.VNF1.HGZ. 2019-03-23T09:34:01.78 3.0 undecidable manual Sn -0.03 0
IV.LRP.EHZ. 2019-03-23T09:33:59.23 3.0 undecidable manual Sg 4.84 0
IT.ORP.HGZ. 2019-03-23T09:33:51.69 3.0 undecidable manual Pn 0.01 0
GU.GRAM.HHZ. 2019-03-23T09:33:51.65 3.0 undecidable manual Pn -4.11 0
IV.VVLD.HHZ. 2019-03-23T09:33:50.25 3.0 undecidable manual Sn -0.06 0
IV.SNTG.HHZ. 2019-03-23T09:33:50.02 0.3 undecidable manual S 338 0.5153 50 0.52 62
IV.VITU.HHZ. 2019-03-23T09:33:49.00 3.0 undecidable manual Pn 0.94 0
IV.PE3.EHZ. 2019-03-23T09:33:49.07 3.0 undecidable manual Sg 1.34 0
IV.RIBO.EHZ.01 2019-03-23T09:33:44.52 3.0 undecidable manual Sn -9.99 0
IV.CSP1.EHZ. 2019-03-23T09:33:43.61 0.3 undecidable manual S 1 0.3157 50 0.02 72
IT.VNF1.HGZ. 2019-03-23T09:33:43.72 3.0 undecidable manual Pn 2.33 0
IV.CESI.HHZ. 2019-03-23T09:33:43.87 0.6 undecidable manual S 317 0.3157 50 0.3 45
IV.EL6.EHZ. 2019-03-23T09:33:43.10 3.0 undecidable manual Sg 2.77 0
IV.RM33.EHZ. 2019-03-23T09:33:42.17 0.3 undecidable manual S 178 0.2671 50 0.04 72
IV.FDMO.HHZ. 2019-03-23T09:33:42.00 0.3 undecidable manual S 342 0.2734 50 -0.33 68
IV.SAP2.EHZ. 2019-03-23T09:33:42.37 3.0 undecidable manual Sg 3.18 0
IV.FIAM.HHZ. 2019-03-23T09:33:42.09 3.0 undecidable manual Sg 2.55 0
IV.CAMP.HHZ. 2019-03-23T09:33:42.57 0.6 undecidable manual S 147 0.2842 50 -0.09 47
IV.SNTG.HHZ. 2019-03-23T09:33:42.02 0.3 undecidable manual P 338 0.5153 50 0.15 67
IV.GAVE.EHZ. 2019-03-23T09:33:41.21 0.3 undecidable manual S 250 0.2392 110 -0.04 73
IV.MNTT.EHZ. 2019-03-23T09:33:41.03 3.0 undecidable manual Sn -0.01 0
IV.GIGS.HHZ. 2019-03-23T09:33:40.37 3.0 undecidable manual Sn -0.7 0
IV.LNSS.HHZ. 2019-03-23T09:33:40.17 0.3 undecidable manual S 214 0.2086 112 0.03 73
IV.VVLD.HHZ. 2019-03-23T09:33:39.29 3.0 negative manual Pg 4.36 0
IV.MMO1.EHZ. 2019-03-23T09:33:38.14 0.1 undecidable manual S 37 0.1547 119 -0.12 97
IV.GUMA.HHZ. 2019-03-23T09:33:38.43 0.3 undecidable manual P 19 0.3031 50 0.19 70
IV.MC2.EHZ. 2019-03-23T09:33:38.08 0.3 undecidable manual S 357 0.1358 122 0.43 68
IV.CSP1.EHZ. 2019-03-23T09:33:38.28 0.1 undecidable manual P 1 0.3157 50 -0.18 93
IV.CESI.HHZ. 2019-03-23T09:33:38.45 0.1 undecidable manual P 317 0.3157 50 0.01 96
IV.MF5.EHZ. 2019-03-23T09:33:37.98 3.0 undecidable manual Sg -0.89 0
IT.MTCL.HGE. 2019-03-23T09:33:37.34 0.1 undecidable manual P 326 0.2635 50 -0.21 93
IV.RM33.EHZ. 2019-03-23T09:33:37.53 0.1 undecidable manual P 178 0.2671 50 -0.08 95
IV.FDMO.HHZ. 2019-03-23T09:33:37.64 0.1 undecidable manual P 342 0.2734 50 -0.09 95
IV.MTRA.EHZ. 2019-03-23T09:33:37.89 0.3 undecidable manual S 97 0.1457 121 -0.06 74
IV.CAMP.HHZ. 2019-03-23T09:33:37.71 0.1 undecidable manual P 147 0.2842 50 -0.21 93
IV.GAVE.EHZ. 2019-03-23T09:33:36.99 0.1 undecidable manual P 250 0.2392 110 -0.12 95
IV.LNSS.HHZ. 2019-03-23T09:33:36.60 0.1 undecidable manual P 214 0.2086 112 0.14 96
IV.FEMA.HNE. 2019-03-23T09:33:36.72 0.3 undecidable manual P 329 0.2167 112 0.09 72
IV.TERO.HHZ. 2019-03-23T09:33:36.92 3.0 undecidable manual Sn -3.32 0
IV.T1299.EHE. 2019-03-23T09:33:35.74 0.1 undecidable manual P 157 0.1538 119 0.38 92
IV.NRCA.HHZ. 2019-03-23T09:33:35.70 0.3 undecidable manual S 313 0.0854 135 -0.43 69
IV.MTRA.EHZ. 2019-03-23T09:33:35.21 0.1 undecidable manual P 97 0.1457 121 0.01 99
IV.MMO1.EHZ. 2019-03-23T09:33:35.29 0.1 undecidable manual P 37 0.1547 119 -0.09 97
IV.SMA1.EHZ. 2019-03-23T09:33:35.84 0.3 undecidable manual P 146 0.1754 116 0.04 73
IV.MC2.EHZ. 2019-03-23T09:33:35.05 0.1 undecidable manual P 357 0.1358 122 0.03 99
IV.NRCA.HHZ. 2019-03-23T09:33:34.12 0.1 undecidable manual P 313 0.0854 135 -0.02 100
TV.SF04.EHZ. 2019-03-23T09:33:27.93 3.0 negative manual P -4.5 0
IV.SSFR.HNZ. 2019-03-23T09:33:24.07 3.0 positive manual P -6.05 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF04.EHN. ML:1.6 2.7457645E-5 0.0832 AML other m 2019-03-23T09:33:45.45
IV.NRCA.HNE. ML:2 0.00123008895 0.1024 AML other m 2019-03-23T09:33:36.59
IV.NRCA.HNN. ML:2 0.001265264 0.1664 AML other m 2019-03-23T09:33:36.58
IV.NRCA.HHE. ML:2 0.0012150704 0.1024 AML other m 2019-03-23T09:33:36.58
IV.NRCA.HHN. ML:2 0.0013637385 0.1792 AML other m 2019-03-23T09:33:36.57
IV.MTRA.HNE. ML:1.7 0.00051847345 0.16 AML other m 2019-03-23T09:33:38.68
IV.MTRA.HNN. ML:1.7 0.00048827525 0.224 AML other m 2019-03-23T09:33:38.52
IV.MTRA.EHE. ML:1.7 0.00051681615 0.16 AML other m 2019-03-23T09:33:38.68
IV.MTRA.EHN. ML:1.7 0.00047358475 0.2176 AML other m 2019-03-23T09:33:38.52
IV.SMA1.EHE. ML:1.6 0.0002744776 0.544 AML other m 2019-03-23T09:33:44.58
IV.SMA1.EHN. ML:1.4 0.000210736 0.2624 AML other m 2019-03-23T09:33:42.54
IV.LNSS.HHE. ML:1.9 0.00049515245 0.1216 AML other m 2019-03-23T09:33:41.93
IV.LNSS.HHN. ML:1.9 0.00053545755 0.1408 AML other m 2019-03-23T09:33:41.42
IV.LNSS.HNE. ML:1.8 0.0004539772 0.1152 AML other m 2019-03-23T09:33:42.10
IV.LNSS.HNN. ML:1.9 0.0004645216705 0.1408 AML other m 2019-03-23T09:33:41.42
IV.GAVE.EHE. ML:2.1 0.00070099965 0.1408 AML other m 2019-03-23T09:33:41.59
IV.GAVE.EHN. ML:2.1 0.0006501952 0.1792 AML other m 2019-03-23T09:33:42.07
IV.GAVE.HNE. ML:2.1 0.0007590122 0.1344 AML other m 2019-03-23T09:33:41.65
IV.GAVE.HNN. ML:1.6 0.00020582515 0.1728 AML other m 2019-03-23T09:33:41.98
IV.RM33.EHE. ML:1.6 0.0002022639 0.1408 AML other m 2019-03-23T09:33:42.57
IV.RM33.EHN. ML:1.8 0.00028316715 0.2048 AML other m 2019-03-23T09:33:42.62
IV.RM33.HNE. ML:1.6 0.00021308298 0.1344 AML other m 2019-03-23T09:33:43.09
IV.RM33.HNN. ML:1.8 0.00028505715 0.2048 AML other m 2019-03-23T09:33:42.61
IV.FDMO.HHE. ML:1.3 0.000107382385 0.1408 AML other m 2019-03-23T09:33:44.66
IV.FDMO.HHN. ML:1.5 0.00014286885 0.1792 AML other m 2019-03-23T09:33:42.97
IV.CAMP.HHE. ML:1.1 5.7767665E-5 0.1408 AML other m 2019-03-23T09:33:42.96
IV.CAMP.HHN. ML:1 4.788884E-5 0.6592 AML other m 2019-03-23T09:33:50.62
IV.CSP1.EHE. ML:1.8 0.00024820855 0.1984 AML other m 2019-03-23T09:33:44.63
IV.CSP1.EHN. ML:1.8 0.00023398565 0.32 AML other m 2019-03-23T09:33:44.44
IV.GUMA.HHE. ML:2.1 0.00057993005 0.2368 AML other m 2019-03-23T09:33:44.66
IV.GUMA.HHN. ML:2 0.0004122838 0.2432 AML other m 2019-03-23T09:33:46.03
IV.GUMA.HNE. ML:2 0.00043564965 0.2304 AML other m 2019-03-23T09:33:44.66
IV.CESI.HHE. ML:1.4 9.6162145E-5 0.16 AML other m 2019-03-23T09:33:44.21
IV.CESI.HHN. ML:1.6 0.00015923535 0.1792 AML other m 2019-03-23T09:33:44.98
IV.VVLD.HHE. ML:1.5 3.089051E-5 0.0576 AML other m 2019-03-23T09:33:55.73
IV.VVLD.HHN. ML:1.4 1.86346E-5 0.0832 AML other m 2019-03-23T09:33:55.76
IV.SNTG.HNN. ML:2 0.00019254215 0.7488 AML other m 2019-03-23T09:33:57.53
IV.SNTG.HHE. ML:1.1 2.7461205E-5 0.16 AML other m 2019-03-23T09:33:51.18
IV.SNTG.HHN. ML:1.2 3.594972E-5 0.16 AML other m 2019-03-23T09:33:53.76
IV.VITU.HHE. ML:2.1 3.331298E-5 0.2816 AML other m 2019-03-23T09:34:22.92
IV.VITU.HHN. ML:2.2 4.47935E-5 0.2944 AML other m 2019-03-23T09:34:32.79
GU.GRAM.HHE. ML:2.3 1.9517785E-5 0.1792 AML other m 2019-03-23T09:34:24.77
GU.GRAM.HHN. ML:2.3 1.81597925E-5 0.0576 AML other m 2019-03-23T09:34:25.46
IV.EUCT.HNE. ML:3.9 0.0004301796 0.0384 AML other m 2019-03-23T09:34:33.67
IV.EUCT.HNN. ML:4.1 0.00061976395 0.0576 AML other m 2019-03-23T09:34:32.86
IV.CMPR.HHE. ML:2.2 1.2779101E-5 0.704 AML other m 2019-03-23T09:34:42.45
IV.CMPR.HHN. ML:2 1.21017355E-5 1.5552 AML other m 2019-03-23T09:34:27.47
IV.SPS2.HHE. ML:2.8 2.405687E-5 0.0768 AML other m 2019-03-23T09:34:22.28
IV.SPS2.HHN. ML:2.8 2.336843E-5 0.1408 AML other m 2019-03-23T09:34:22.31
IV.IFIL.HHE. ML:3.8 0.00022362145 0.5632 AML other m 2019-03-23T09:34:27.85
IV.IFIL.HHN. ML:3.3 6.9401155E-5 0.4416 AML other m 2019-03-23T09:35:17.15
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