Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 27-02-2020 and time 09:44:54 (UTC) in region 3 km SW Amatrice (RI)

A magnitude ML 1.7 earthquake occured in region: 3 km SW Amatrice (RI), on

  • 27-02-2020 09:44:54 (UTC)
  • 27-02-2020 10:44:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6040, 13.2680 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
Amatrice RI 3 2657 2657
Cittareale RI 9 482 3139
Montereale AQ 9 2581 5720
Capitignano AQ 10 665 6385
Campotosto AQ 10 542 6927
Accumoli RI 10 667 7594
Borbona RI 15 617 8211
Cagnano Amiterno AQ 16 1369 9580
Posta RI 17 694 10274
Barete AQ 17 737 11011
Crognaleto TE 18 1297 12308
Pizzoli AQ 19 4326 16634
Arquata del Tronto AP 19 1178 17812
Cortino TE 20 656 18468

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NW of L'Aquila (69753 inhabitants)
36 Km W of Teramo (54892 inhabitants)
51 Km E of Terni (111501 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
79 Km W of Chieti (51815 inhabitants)
79 Km W of Pescara (121014 inhabitants)
81 Km NE of Guidonia Montecelio (88673 inhabitants)
81 Km NE of Tivoli (56533 inhabitants)
91 Km SE of Perugia (166134 inhabitants)
98 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 1.7 2020-02-27
09:44:54		 42.6042 13.2677 12 2020-07-18
21:08:23		 Bollettino Sismico Italiano INGV 77046731
Reviewed
Rev100 		ML 1.7 2020-02-27
09:44:54		 42.6175 13.2683 11 2020-02-27
09:56:14		 Sala Sismica INGV-Roma 76863071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-27 09:44:54 ± 0.07
Latitude 42.6042 ± 0.0036
Longitude 13.2677 ± 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 77046731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 449
Semi-minor axis of confidence ellipse (meter) 153
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 79
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 74
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.03148
Epicentral distance of station farthest from the epicenter (degree) 0.45146
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 77046731
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-03-27 07:23:18

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 76863071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-27 09:56:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2020-02-27T09:45:09.78 0.3 undecidable manual S 343 50.1165 91 -0.09 69
IV.MF5.EHZ. 2020-02-27T09:45:09.28 0.1 undecidable manual S 20 45.3213 91 0.7 80
IV.MC2.EHZ. 2020-02-27T09:45:05.87 0.6 undecidable manual S 349 34.6431 92 0.13 47
IV.GAVE.EHZ. 2020-02-27T09:45:04.85 0.6 undecidable manual S 288 32.0457 92 -0.17 47
IV.GIGS.HHZ. 2020-02-27T09:45:04.46 0.3 undecidable manual S 124 30.0477 92 -0.04 71
IV.NRCA.HHZ. 2020-02-27T09:45:03.61 0.3 undecidable manual S 334 28.3494 93 -0.44 67
IV.TERO.HHZ. 2020-02-27T09:45:03.56 0.3 undecidable manual S 86 27.5502 93 -0.27 68
IV.MF5.EHZ. 2020-02-27T09:45:02.93 0.1 undecidable manual P 20 45.3213 91 0.5 86
IV.FDMO.HHZ. 2020-02-27T09:45:02.99 0.3 undecidable manual P 343 50.1165 91 -0.18 68
IV.LNSS.HHZ. 2020-02-27T09:45:01.25 0.6 undecidable manual S 270 18.5703 97 -0.2 48
IV.FIAM.HHZ. 2020-02-27T09:45:01.17 0.3 undecidable manual P 198 39.3273 92 -0.32 67
IV.MTRA.HNZ. 2020-02-27T09:45:01.29 0.6 undecidable manual S 32 19.869 96 -0.51 44
IV.GAVE.EHZ. 2020-02-27T09:45:00.29 0.1 positive manual P 288 32.0457 92 -0.09 96
IV.MMO1.EHN. 2020-02-27T09:45:00.42 0.1 undecidable manual P 8 33.0447 92 -0.12 94
IV.MC2.EHZ. 2020-02-27T09:45:00.77 0.1 undecidable manual P 349 34.6431 92 -0.02 96
IV.CAMP.HHZ. 2020-02-27T09:45:00.26 0.1 undecidable manual S 123 13.7751 109 0.05 100
IV.RM33.EHZ. 2020-02-27T09:44:59.85 0.3 undecidable manual S 202 11.3775 118 0.23 72
IV.GIGS.HHZ. 2020-02-27T09:44:59.97 0.1 undecidable manual P 124 30.0477 92 -0.11 94
IV.TERO.HHZ. 2020-02-27T09:44:59.59 0.1 undecidable manual P 86 27.5502 93 -0.1 95
IV.NRCA.HHZ. 2020-02-27T09:44:59.65 0.1 positive manual P 334 28.3494 93 -0.16 94
IV.MTRA.HNZ. 2020-02-27T09:44:58.40 0.1 positive manual P 32 19.869 96 -0.12 96
IV.SMA1.EHZ. 2020-02-27T09:44:58.44 0.3 undecidable manual S 62 6.1938 143 -0.14 74
IV.LNSS.HHZ. 2020-02-27T09:44:58.38 0.1 positive manual P 270 18.5703 97 0.07 98
IV.CAMP.HHZ. 2020-02-27T09:44:57.77 0.1 undecidable manual P 123 13.7751 109 0.17 97
IV.T1299.HNZ. 2020-02-27T09:44:57.89 0.1 undecidable manual S 20 3.4965 158 -0.34 96
IV.RM33.EHZ. 2020-02-27T09:44:57.85 0.1 positive manual P 202 11.3775 118 0.59 87
IV.SMA1.EHZ. 2020-02-27T09:44:56.90 0.1 positive manual P 62 6.1938 143 0.25 97
IV.T1299.HNZ. 2020-02-27T09:44:56.54 0.1 negative manual P 20 3.4965 158 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:2.6 0.00505 0.28 AML other m 2020-02-27T09:44:58.71
IV.SMA1.EHN. ML:2.3 0.002835 1.9 AML other m 2020-02-27T09:44:58.04
IV.RM33.EHN. ML:1.8 0.0006915000000000001 0.12 AML other m 2020-02-27T09:45:00.58
IV.RM33.EHE. ML:2.0 0.0011149999999999999 0.86 AML other m 2020-02-27T09:45:00.72
IV.LNSS.HHN. ML:1.7 0.000388 0.32 AML other m 2020-02-27T09:45:01.47
IV.LNSS.HHE. ML:1.8 0.00041799999999999997 0.76 AML other m 2020-02-27T09:45:01.52
IV.MTRA.EHN. ML:1.8 0.00046950000000000003 0.24 AML other m 2020-02-27T09:45:01.80
IV.MTRA.EHE. ML:1.6 0.00031599999999999993 0.42 AML other m 2020-02-27T09:45:02.32
IV.TERO.HHN. ML:1.6 0.00020050000000000002 0.3 AML other m 2020-02-27T09:45:03.62
IV.NRCA.HHE. ML:1.6 0.0002275 0.12 AML other m 2020-02-27T09:45:04.25
IV.NRCA.HHN. ML:1.6 0.0002045 0.48 AML other m 2020-02-27T09:45:04.80
IV.TERO.HHE. ML:1.6 0.000183 0.52 AML other m 2020-02-27T09:45:04.95
IV.GAVE.EHN. ML:1.6 0.000155 0.26 AML other m 2020-02-27T09:45:05.13
IV.GAVE.EHE. ML:1.6 0.0001735 0.2 AML other m 2020-02-27T09:45:06.51
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