Earthquake with magnitude of ML 1.8 on date 31-03-2020 and time 08:50:14 (Italy) in region 2 km NW Accumoli (RI)

A magnitude ML 1.8 earthquake occured in region: 2 km NW Accumoli (RI), on

  • 31-03-2020 06:50:14 (UTC)
  • 31-03-2020 08:50:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.71, 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 2 667 667
Arquata del Tronto AP 9 1178 1845
Amatrice RI 10 2657 4502
Cittareale RI 11 482 4984
Norcia PG 15 4957 9941
Acquasanta Terme AP 16 2916 12857
Montegallo AP 17 523 13380
Cascia PG 18 3217 16597
Campotosto AQ 20 542 17139

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km W of Teramo (54892 inhabitants)
42 Km NW of L'Aquila (69753 inhabitants)
50 Km E of Terni (111501 inhabitants)
51 Km SE of Foligno (57155 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
82 Km SE of Perugia (166134 inhabitants)
85 Km W of Pescara (121014 inhabitants)
86 Km W of Chieti (51815 inhabitants)
89 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km NE of Tivoli (56533 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 2020-03-31
06:50:14
42.71 13.23 11 2020-03-31
06:57:54
Sala Sismica INGV-Roma 77721631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-31 06:50:14 ± 0.05
Latitude 42.71 ± 0.00
Longitude 13.23 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77721631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 308
Semi-minor axis of confidence ellipse (meter) 280
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 318
Circular confidence region, given by single value of horizontal uncertainty (meter) 310
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.28598
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.9
Num. used stations 9
Type of magnitude ML
Reference to an origin 77721631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-31 06:57:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SENA.HHZ. 2020-03-31T06:51:39.09 3.0 undecidable manual Sn -5.67 0
IV.SARZ.HHZ. 2020-03-31T06:51:26.64 3.0 undecidable manual Sn -0.91 0
IV.PII.HHZ. 2020-03-31T06:51:17.36 3.0 undecidable manual Sg 17.59 0
IV.ROSPO.HHZ. 2020-03-31T06:51:06.41 3.0 undecidable manual Sg 9.44 0
IV.SGG.HHZ. 2020-03-31T06:51:05.93 3.0 undecidable manual Sn 0.04 0
IV.GATE.HHZ. 2020-03-31T06:51:03.76 3.0 undecidable manual Sn -3.36 0
IV.VVLD.HHZ. 2020-03-31T06:51:02.95 3.0 undecidable manual Sg 7.95 0
IV.LPEL.HHZ. 2020-03-31T06:51:02.89 3.0 undecidable manual Sg 8.55 0
IV.TDS.HHZ. 2020-03-31T06:51:01.28 3.0 undecidable manual Pn 3.73 0
IV.EUCT.HNZ. 2020-03-31T06:50:57.25 3.0 negative manual Pg 13.8 0
IV.VCEL.EHZ. 2020-03-31T06:50:43.64 3.0 undecidable manual Sn -4.63 0
IV.CADC.HNZ. 2020-03-31T06:50:43.41 3.0 undecidable manual Pn 5.13 0
OT.OT05.EHZ. 2020-03-31T06:50:40.82 3.0 undecidable manual Pg 6.72 0
IV.SEI.HHZ. 2020-03-31T06:50:33.27 3.0 undecidable manual Pg 10.12 0
IV.SAMA.EHZ. 2020-03-31T06:50:33.08 3.0 negative manual Pg 6.8 0
IV.VITU.HHZ. 2020-03-31T06:50:30.83 3.0 undecidable manual Pn -3.25 0
IV.PTRJ.HNZ. 2020-03-31T06:50:28.40 3.0 undecidable manual Pn -3.56 0
IV.RONT.HHZ. 2020-03-31T06:50:26.69 3.0 negative manual Pn 4.11 0
IV.TERO.HHZ. 2020-03-31T06:50:25.44 0.3 undecidable manual S 107 0.286 90 -0.36 67
IV.MMO1.EHZ. 2020-03-31T06:50:23.54 0.3 undecidable manual S 20 0.205 91 0.13 74
IV.CSP1.EHZ. 2020-03-31T06:50:23.17 3.0 positive manual Pg 5.92 0
IV.RM33.EHZ. 2020-03-31T06:50:23.10 0.3 undecidable manual S 184 0.1979 91 -0.08 72
IV.LNSS.HHZ. 2020-03-31T06:50:22.39 0.1 undecidable manual S 234 0.1745 91 -0.11 96
IV.VCEL.EHZ. 2020-03-31T06:50:22.17 3.0 undecidable manual Pn 0.79 0
IV.MTRA.EHZ. 2020-03-31T06:50:21.08 0.1 undecidable manual S 67 0.1313 95 -0.13 99
IV.NRCA.HHZ. 2020-03-31T06:50:21.67 0.3 undecidable manual S 326 0.1538 92 -0.21 71
IV.TERO.HHZ. 2020-03-31T06:50:21.14 0.1 undecidable manual P 107 0.286 90 -0.04 96
IV.SMA1.EHZ. 2020-03-31T06:50:20.57 0.3 undecidable manual S 135 0.107 110 0.05 74
IV.RM33.EHZ. 2020-03-31T06:50:19.73 0.1 undecidable manual P 184 0.1979 91 0.06 99
IV.MMO1.EHZ. 2020-03-31T06:50:19.91 0.1 undecidable manual P 20 0.205 91 0.11 98
IV.LNSS.HHZ. 2020-03-31T06:50:19.33 0.1 undecidable manual P 234 0.1745 91 0.05 99
IV.SMA1.EHZ. 2020-03-31T06:50:18.30 0.1 undecidable manual P 135 0.107 110 0.17 97
IV.MTRA.EHZ. 2020-03-31T06:50:18.70 0.1 negative manual P 67 0.1313 95 0.17 97
IV.NRCA.HHZ. 2020-03-31T06:50:18.98 0.1 negative manual P 326 0.1538 92 0.06 100
IV.PE3.EHZ. 2020-03-31T06:50:17.88 3.0 negative manual P 0.24 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.6 0.0003125 0.12 AML other m 2020-03-31T06:50:21.79
IV.MTRA.EHE. ML:1.2 0.0001345 0.2 AML other m 2020-03-31T06:50:21.88
IV.NRCA.HHN. ML:1.6 0.000368 0.1 AML other m 2020-03-31T06:50:21.79
IV.LNSS.HHN. ML:1 7.79E-5 0.28 AML other m 2020-03-31T06:50:22.81
IV.LNSS.HHE. ML:1.1 0.0001012 0.88 AML other m 2020-03-31T06:50:23.18
IV.SGG.HNE. ML:3.2 0.0005855 0.42 AML other m 2020-03-31T06:50:40.29
IV.SGG.HNN. ML:3.3 0.0007795 0.48 AML other m 2020-03-31T06:50:40.09
IV.CADC.HNN. ML:3.9 0.0004375 0.58 AML other m 2020-03-31T06:50:57.68
IV.CADC.HNE. ML:4.1 0.0008405 0.46 AML other m 2020-03-31T06:50:57.93
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
Waveforms Seismic signals in full SEED format Download