Earthquake with magnitude of ML 1.7 on date 20-02-2020 and time 19:28:33 (Italy) in region 1 km W Accumoli (RI)

A magnitude ML 1.7 earthquake occured in region: 1 km W Accumoli (RI), on

  • 20-02-2020 18:28:33 (UTC)
  • 20-02-2020 19:28:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7, 13.24 at 12 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 1 667 667
Amatrice RI 9 2657 3324
Arquata del Tronto AP 10 1178 4502
Cittareale RI 11 482 4984
Norcia PG 16 4957 9941
Acquasanta Terme AP 16 2916 12857
Montegallo AP 18 523 13380
Cascia PG 19 3217 16597
Campotosto AQ 19 542 17139
Montereale AQ 19 2581 19720

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km W of Teramo (54892 inhabitants)
41 Km NW of L'Aquila (69753 inhabitants)
51 Km E of Terni (111501 inhabitants)
52 Km SE of Foligno (57155 inhabitants)
77 Km W of Montesilvano (53738 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
84 Km W of Pescara (121014 inhabitants)
85 Km W of Chieti (51815 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
89 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 1.7 2020-02-20
18:28:33
42.7 13.24 12 2020-02-20
18:36:39
Sala Sismica INGV-Roma 76677621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-20 18:28:33 ± 0.04
Latitude 42.70 ± 0.00
Longitude 13.24 ± 0.00
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76677621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 224
Semi-minor axis of confidence ellipse (meter) 108
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 256
Circular confidence region, given by single value of horizontal uncertainty (meter) 220
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 44
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.63942
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 17
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 76677621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-20 18:36:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
XK.GIZZ.HHZ. 2020-02-20T18:29:28.89 3.0 negative manual Pg 2.76 0
IV.CRJA.HHZ. 2020-02-20T18:29:26.83 3.0 undecidable manual Pn -7.18 0
IV.EUCT.HNZ. 2020-02-20T18:29:26.47 3.0 positive manual Pn -1.75 0
IV.SARZ.HHZ. 2020-02-20T18:29:22.61 3.0 undecidable manual Pn -4.47 0
IV.SALB.HHZ. 2020-02-20T18:29:18.99 3.0 positive manual Pg 1.97 0
IV.TDS.HHZ. 2020-02-20T18:29:16.31 3.0 undecidable manual Pn -2.94 0
IV.OSSC.HHZ. 2020-02-20T18:29:05.31 3.0 undecidable manual Pg 7.42 0
IV.IMOL.HNZ. 2020-02-20T18:29:03.19 3.0 positive manual Pn 0.43 0
IV.SAMA.EHZ. 2020-02-20T18:28:57.62 3.0 undecidable manual Sg 0.62 0
IV.RMP.HHZ. 2020-02-20T18:28:52.50 3.0 undecidable manual Sn -2.82 0
IV.FIAM.HHZ. 2020-02-20T18:28:48.90 0.6 undecidable manual S 192 0.4389 91 0.07 46
IV.PTRJ.HHZ. 2020-02-20T18:28:47.16 3.0 negative manual Pg -2.52 0
IV.CSP1.EHZ. 2020-02-20T18:28:47.89 0.3 undecidable manual S 356 0.3948 92 0.37 67
IV.ARRO.EHZ. 2020-02-20T18:28:46.77 0.6 undecidable manual S 251 0.3687 92 0.02 48
IV.FDMO.HHZ. 2020-02-20T18:28:46.50 0.3 undecidable manual S 342 0.357 92 0.11 71
IV.EL6.EHZ. 2020-02-20T18:28:45.67 0.1 undecidable manual P 351 0.6394 91 -0.05 90
IV.GIGS.HHZ. 2020-02-20T18:28:45.84 0.6 undecidable manual S 135 0.3453 92 -0.21 47
IV.GAVE.EHZ. 2020-02-20T18:28:43.36 0.3 undecidable manual S 269 0.2545 93 -0.01 73
IV.TERO.HHZ. 2020-02-20T18:28:43.81 0.1 undecidable manual S 106 0.277 93 -0.22 95
IV.FIAM.HHZ. 2020-02-20T18:28:42.09 0.1 undecidable manual P 192 0.4389 91 -0.19 91
IV.MMO1.EHZ. 2020-02-20T18:28:42.12 0.3 undecidable manual S 17 0.2113 95 0.03 74
IV.RM33.EHZ. 2020-02-20T18:28:41.67 0.1 undecidable manual S 186 0.1898 97 0.23 95
IV.ARRO.EHZ. 2020-02-20T18:28:41.08 0.1 undecidable manual P 251 0.3687 92 -0.01 95
IV.CAMP.HHZ. 2020-02-20T18:28:41.88 0.3 undecidable manual S 143 0.2032 95 0.02 73
IV.CSP1.EHZ. 2020-02-20T18:28:41.47 0.1 undecidable manual P 356 0.3948 92 -0.06 94
IV.LNSS.HHZ. 2020-02-20T18:28:41.04 0.3 undecidable manual S 237 0.1754 98 0.01 74
IV.FDMO.HHZ. 2020-02-20T18:28:40.73 0.1 undecidable manual P 342 0.357 92 -0.16 93
IV.GIGS.HHZ. 2020-02-20T18:28:40.56 0.1 undecidable manual P 135 0.3453 92 -0.13 95
IV.NRCA.HNZ. 2020-02-20T18:28:40.43 0.3 undecidable manual S 326 0.1646 100 -0.28 70
IV.MF5.EHZ. 2020-02-20T18:28:40.83 0.1 undecidable manual P 29 0.331 92 0.38 89
IV.GAVE.EHZ. 2020-02-20T18:28:39.11 0.1 undecidable manual P 269 0.2545 93 -0.03 97
IV.MTRA.HNZ. 2020-02-20T18:28:39.50 0.3 undecidable manual S 63 0.1286 109 -0.18 73
IV.TERO.HHZ. 2020-02-20T18:28:39.37 0.1 undecidable manual P 106 0.277 93 -0.16 96
IV.MMO1.EHZ. 2020-02-20T18:28:38.34 0.1 undecidable manual P 17 0.2113 95 -0.05 98
IV.RM33.EHZ. 2020-02-20T18:28:38.05 0.1 undecidable manual P 186 0.1898 97 0.02 99
IV.SMA1.EHZ. 2020-02-20T18:28:38.84 0.3 undecidable manual S 134 0.0962 123 0.02 75
IV.T1299.HNZ. 2020-02-20T18:28:38.24 0.3 undecidable manual S 154 0.0701 136 0.01 76
IV.CAMP.HHZ. 2020-02-20T18:28:38.20 0.1 undecidable manual P 143 0.2032 95 -0.06 99
IV.MTRA.HNZ. 2020-02-20T18:28:37.02 0.1 undecidable manual P 63 0.1286 109 0.01 100
IV.RMP.HHZ. 2020-02-20T18:28:37.28 3.0 positive manual Pn -5.58 0
IV.NRCA.HNZ. 2020-02-20T18:28:37.52 0.1 undecidable manual P 326 0.1646 100 -0.08 98
IV.LNSS.HHZ. 2020-02-20T18:28:37.79 0.1 undecidable manual P 237 0.1754 98 0 99
IV.SMA1.EHZ. 2020-02-20T18:28:36.65 0.1 undecidable manual P 134 0.0962 123 0.13 98
IV.T1299.HNZ. 2020-02-20T18:28:36.35 0.1 undecidable manual P 154 0.0701 136 0.18 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.HNE. ML:1.8 0.0006205 0.86 AML other m 2020-02-20T18:28:39.96
IV.SMA1.EHN. ML:1.4 0.0002825 1.02 AML other m 2020-02-20T18:28:39.25
IV.SMA1.EHE. ML:1.5 0.000357 0.86 AML other m 2020-02-20T18:28:39.36
IV.MTRA.HNN. ML:1.7 0.0005335 0.86 AML other m 2020-02-20T18:28:39.95
IV.MTRA.EHN. ML:1.8 0.0005595 0.88 AML other m 2020-02-20T18:28:39.96
IV.MTRA.EHE. ML:1.7 0.000542 1.58 AML other m 2020-02-20T18:28:40.17
IV.NRCA.HHN. ML:1.9 0.0005645 0.22 AML other m 2020-02-20T18:28:40.63
IV.NRCA.HHE. ML:2.3 0.001415 0.14 AML other m 2020-02-20T18:28:40.59
IV.LNSS.HHE. ML:1.8 0.000524 0.24 AML other m 2020-02-20T18:28:41.22
IV.LNSS.HHN. ML:1.8 0.0004605 0.28 AML other m 2020-02-20T18:28:41.42
IV.RM33.HNN. ML:1.7 0.000337 0.18 AML other m 2020-02-20T18:28:41.66
IV.RM33.EHN. ML:1.7 0.000362 0.2 AML other m 2020-02-20T18:28:41.66
IV.RM33.HNE. ML:1.7 0.0003175 0.34 AML other m 2020-02-20T18:28:43.04
IV.RM33.EHE. ML:1.7 0.0003065 1.76 AML other m 2020-02-20T18:28:43.93
IV.GAVE.EHN. ML:1.6 0.000225 0.26 AML other m 2020-02-20T18:28:43.67
IV.GAVE.EHE. ML:1.6 0.000203 0.56 AML other m 2020-02-20T18:28:43.69
IV.TERO.HHN. ML:1.4 0.00011 0.56 AML other m 2020-02-20T18:28:44.07
IV.TERO.HHE. ML:1.2 6.655E-5 1 AML other m 2020-02-20T18:28:44.87
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