Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 28-02-2021 and time 02:25:49 (Italy) in region 3 km W Amatrice (RI)

A magnitude ML 1.8 earthquake occured in region: 3 km W Amatrice (RI), on

  • 28-02-2021 01:25:49 (UTC)
  • 28-02-2021 02:25:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6220, 13.2510 at 14 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 7 482 3139
Accumoli RI 8 667 3806
Montereale AQ 11 2581 6387
Capitignano AQ 12 665 7052
Campotosto AQ 12 542 7594
Borbona RI 16 617 8211
Posta RI 17 694 8905
Arquata del Tronto AP 17 1178 10083
Cagnano Amiterno AQ 18 1369 11452
Barete AQ 19 737 12189

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NW of L'Aquila (69753 inhabitants)
37 Km W of Teramo (54892 inhabitants)
50 Km E of Terni (111501 inhabitants)
58 Km SE of Foligno (57155 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
81 Km W of Pescara (121014 inhabitants)
81 Km W of Chieti (51815 inhabitants)
81 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km NE of Tivoli (56533 inhabitants)
89 Km SE of Perugia (166134 inhabitants)
97 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 1.8 2021-02-28
01:25:49		 42.6218 13.2513 14 2021-07-12
16:55:01		 Bollettino Sismico Italiano INGV 87945981
Reviewed
Rev100 		ML 1.9 2021-02-28
01:25:49		 42.6377 13.2637 14 2021-02-28
01:36:43		 Sala Sismica INGV-Roma 87555621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-28 01:25:49 ± 0.07
Latitude 42.6218 ± 0.0036
Longitude 13.2513 ± 0.0049
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87945981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 477
Semi-minor axis of confidence ellipse (meter) 85
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
Number of associated phases, regardless of their use for origin computation 55
Number of defining phases 55
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.02608
Epicentral distance of station farthest from the epicenter (degree) 0.71586
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 28
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 87945981
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-09 16:40:15

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 87555621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-28 01:36:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-02-28T01:26:14.73 0.6 undecidable manual S 351 79.4649 92 1.49 25
IV.T0110.HHZ. 2021-02-28T01:26:08.97 0.3 undecidable manual S 135 61.1943 93 0.6 60
IV.MNTT.EHZ. 2021-02-28T01:26:08.49 0.6 undecidable manual S 30 56.2992 93 1.42 27
IV.VCEL.EHE. 2021-02-28T01:26:07.41 0.3 undecidable manual S 117 54.4011 93 0.85 55
IV.GUMA.HHZ. 2021-02-28T01:26:06.06 0.3 undecidable manual S 8 49.4172 94 0.83 55
IV.CESI.HHZ. 2021-02-28T01:26:06.10 0.3 undecidable manual S 327 51.0156 94 0.43 64
IV.OFFI.HHN. 2021-02-28T01:26:06.33 0.6 undecidable manual S 45 49.617 94 1.04 33
IV.CSP1.EHZ. 2021-02-28T01:26:06.16 0.3 undecidable manual S 356 52.3032 94 0.16 68
IV.FAGN.HHZ. 2021-02-28T01:26:05.73 0.6 undecidable manual S 145 47.9187 94 0.88 37
IV.MF5.EHZ. 2021-02-28T01:26:04.40 0.3 undecidable manual S 23 44.0226 95 0.6 61
IT.MTCL.HGZ. 2021-02-28T01:26:04.65 0.6 undecidable manual S 334 46.1205 94 0.29 45
IV.FDMO.HHZ. 2021-02-28T01:26:04.98 0.6 undecidable manual S 344 47.9187 94 0.14 46
IV.FIAM.HNZ. 2021-02-28T01:26:03.13 0.3 undecidable manual S 196 40.7259 95 0.19 70
IV.EL6.EHZ. 2021-02-28T01:26:03.04 0.1 undecidable manual P 351 79.4649 92 -0.2 86
IV.FEMA.HNE. 2021-02-28T01:26:02.94 0.6 undecidable manual S 337 41.1255 95 -0.11 47
IV.ARRO.EHZ. 2021-02-28T01:26:02.62 0.6 undecidable manual S 263 39.9267 95 -0.1 47
IV.MMO1.EHZ. 2021-02-28T01:26:00.11 0.3 undecidable manual S 11 31.4463 98 -0.34 69
IV.GIGS.HHN. 2021-02-28T01:26:00.22 0.3 undecidable manual S 125 32.2455 97 -0.46 66
MN.AQU.HNE. 2021-02-28T01:26:00.71 0.3 undecidable manual S 157 32.2455 97 0.03 73
IV.GAVE.EHZ. 2021-02-28T01:26:00.20 0.3 undecidable manual S 285 30.1476 98 0.07 73
IV.T0110.HHZ. 2021-02-28T01:26:00.21 0.1 undecidable manual P 135 61.1943 93 -0.22 88
IV.MNTT.EHZ. 2021-02-28T01:26:00.29 0.3 undecidable manual P 30 56.2992 93 0.61 60
IV.VCEL.EHE. 2021-02-28T01:25:59.54 0.1 undecidable manual P 117 54.4011 93 0.16 91
IV.OFFI.HHN. 2021-02-28T01:25:58.18 0.1 undecidable manual P 45 49.617 94 -0.46 86
IV.CSP1.EHZ. 2021-02-28T01:25:58.78 0.1 undecidable manual P 356 52.3032 94 -0.28 89
IV.FAGN.HHZ. 2021-02-28T01:25:58.40 0.1 undecidable manual P 145 47.9187 94 0 95
IV.NRCA.HHZ. 2021-02-28T01:25:58.71 0.3 undecidable manual S 335 26.0517 101 -0.32 69
IV.GUMA.HHZ. 2021-02-28T01:25:58.68 0.1 undecidable manual P 8 49.4172 94 0.06 93
IV.TERO.HHZ. 2021-02-28T01:25:58.94 0.3 undecidable manual S 90 28.749 99 -0.82 59
IV.FDMO.HHZ. 2021-02-28T01:25:58.05 0.1 undecidable manual P 344 47.9187 94 -0.34 89
IV.CESI.HHZ. 2021-02-28T01:25:58.68 0.1 undecidable manual P 327 51.0156 94 -0.19 91
IV.ARRO.EHZ. 2021-02-28T01:25:57.16 0.1 undecidable manual P 263 39.9267 95 0 95
IV.LNSS.HHZ. 2021-02-28T01:25:57.10 0.3 undecidable manual S 263 17.3715 112 0.29 71
IV.FIAM.HNZ. 2021-02-28T01:25:57.30 0.1 undecidable manual P 196 40.7259 95 0.01 95
IV.FEMA.HNE. 2021-02-28T01:25:57.16 0.3 undecidable manual P 337 41.1255 95 -0.19 69
IV.MF5.EHZ. 2021-02-28T01:25:57.91 0.1 undecidable manual P 23 44.0226 95 0.12 93
IT.MTCL.HGZ. 2021-02-28T01:25:57.80 0.3 undecidable manual P 334 46.1205 94 -0.31 67
IV.MTRA.HNZ. 2021-02-28T01:25:56.58 0.3 undecidable manual S 38 19.0698 109 -0.66 65
IV.CAMP.HHZ. 2021-02-28T01:25:56.29 0.3 undecidable manual S 126 16.0728 115 -0.19 72
IV.GAVE.EHZ. 2021-02-28T01:25:55.66 0.1 undecidable manual P 285 30.1476 98 -0.01 97
IV.TERO.HHZ. 2021-02-28T01:25:55.07 0.1 undecidable manual P 90 28.749 99 -0.39 91
IV.MC2.EHZ. 2021-02-28T01:25:55.86 0.1 undecidable manual P 351 32.5452 97 -0.17 94
IV.MMO1.EHZ. 2021-02-28T01:25:55.56 0.1 undecidable manual P 11 31.4463 98 -0.29 92
IV.RM33.EHZ. 2021-02-28T01:25:55.99 0.3 undecidable manual S 194 12.876 124 0.24 72
IV.GIGS.HHN. 2021-02-28T01:25:55.58 0.1 undecidable manual P 125 32.2455 97 -0.41 89
MN.AQU.HNE. 2021-02-28T01:25:55.87 0.1 undecidable manual P 157 32.2455 97 -0.12 95
IV.NRCA.HHZ. 2021-02-28T01:25:54.85 0.1 undecidable manual P 335 26.0517 101 -0.19 95
IV.T1299.EHE. 2021-02-28T01:25:54.26 0.3 undecidable manual S 61 2.8971 165 0.09 75
IV.SMA1.EHZ. 2021-02-28T01:25:54.07 0.3 undecidable manual S 82 6.8931 146 -0.55 68
IV.RM33.EHZ. 2021-02-28T01:25:53.42 0.1 undecidable manual P 194 12.876 124 0.28 95
IV.CAMP.HHZ. 2021-02-28T01:25:53.57 0.1 undecidable manual P 126 16.0728 115 0.01 100
IV.MTRA.HNZ. 2021-02-28T01:25:53.72 0.1 undecidable manual P 38 19.0698 109 -0.28 95
IV.LNSS.HHZ. 2021-02-28T01:25:53.95 0.1 undecidable manual P 263 17.3715 112 0.2 96
IV.T1299.EHE. 2021-02-28T01:25:52.42 0.1 undecidable manual P 61 2.8971 165 0.19 98
IV.SMA1.EHZ. 2021-02-28T01:25:52.60 0.1 undecidable manual P 82 6.8931 146 0.11 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.5 0.00034750000000000004 1.68 AML other m 2021-02-28T01:25:54.00
IV.SMA1.EHE. ML:1.7 0.0005549999999999999 0.12 AML other m 2021-02-28T01:25:55.55
IV.RM33.HNN. ML:2.0 0.0009175 0.16 AML other m 2021-02-28T01:25:56.23
IV.RM33.EHN. ML:2.0 0.0008685 0.14 AML other m 2021-02-28T01:25:56.16
IV.RM33.HNE. ML:2.0 0.0009350000000000001 0.12 AML other m 2021-02-28T01:25:56.37
IV.RM33.EHE. ML:2.0 0.0009395 0.12 AML other m 2021-02-28T01:25:56.37
IV.MTRA.EHE. ML:1.9 0.0005369999999999999 0.44 AML other m 2021-02-28T01:25:56.70
IV.MTRA.HNE. ML:1.9 0.0005465 0.44 AML other m 2021-02-28T01:25:56.70
IV.MTRA.HNN. ML:1.9 0.0005685 1.44 AML other m 2021-02-28T01:25:56.74
IV.MTRA.EHN. ML:1.9 0.0005135000000000001 0.1 AML other m 2021-02-28T01:25:56.74
IV.LNSS.HHN. ML:1.8 0.00046199999999999995 0.34 AML other m 2021-02-28T01:25:57.46
IV.LNSS.HHE. ML:1.9 0.0005805000000000001 1.22 AML other m 2021-02-28T01:25:57.35
IV.NRCA.HHN. ML:1.9 0.0003945 0.12 AML other m 2021-02-28T01:25:58.86
IV.NRCA.HHE. ML:2.3 0.001016 1.06 AML other m 2021-02-28T01:25:59.34
IV.TERO.HHN. ML:1.4 0.000125 0.74 AML other m 2021-02-28T01:25:59.53
IV.TERO.HHE. ML:1.3 0.00010295 0.48 AML other m 2021-02-28T01:26:00.53
IV.GAVE.EHN. ML:1.9 0.000399 0.56 AML other m 2021-02-28T01:26:00.57
IV.GAVE.EHE. ML:1.8 0.00028799999999999995 1.56 AML other m 2021-02-28T01:26:00.80
IV.GUMA.HHE. ML:2.0 0.00027749999999999997 0.2 AML other m 2021-02-28T01:26:06.38
IV.FAGN.HHN. ML:1.4 0.00007714999999999999 0.46 AML other m 2021-02-28T01:26:07.38
IV.FAGN.HHE. ML:1.5 0.0000825 0.28 AML other m 2021-02-28T01:26:08.41
IV.LNSS.HNN. ML:1.7 0.0003625662 0.14 AML other m 2021-02-28T01:25:57.29
IV.LNSS.HNE. ML:1.8 0.0005014611 0.14 AML other m 2021-02-28T01:25:57.28
IV.ARRO.EHN. ML:1.1 0.00004530679 0.2 AML other m 2021-02-28T01:26:03.57
IV.ARRO.EHE. ML:1.1 0.000043147175 0.14 AML other m 2021-02-28T01:26:04.51
IV.GUMA.HNE. ML:1.9 0.00020955555000000002 1.1696 AML other m 2021-02-28T01:26:06.00
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