Earthquake with magnitude of ML 1.7 on date 28-02-2021 and time 05:00:24 (Italy) in region 6 km W Arquata del Tronto (AP)

A magnitude ML 1.7 earthquake occured in region: 6 km W Arquata del Tronto (AP), on

  • 28-02-2021 04:00:24 (UTC)
  • 28-02-2021 05:00:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7880, 13.2230 at 9 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.

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 6 1178 1178
Accumoli RI 11 667 1845
Norcia PG 11 4957 6802
Montegallo AP 11 523 7325
Castelsantangelo sul Nera MC 13 281 7606
Montemonaco AP 15 604 8210
Acquasanta Terme AP 15 2916 11126
Preci PG 18 724 11850
Amatrice RI 18 2657 14507
Ussita MC 19 444 14951
Cascia PG 19 3217 18168
Visso MC 19 1107 19275
Cittareale RI 20 482 19757
Montefortino FM 20 1178 20935

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km W of Teramo (54892 inhabitants)
46 Km E of Foligno (57155 inhabitants)
51 Km N of L'Aquila (69753 inhabitants)
53 Km E of Terni (111501 inhabitants)
77 Km E of Perugia (166134 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
89 Km W of Pescara (121014 inhabitants)
91 Km NW of Chieti (51815 inhabitants)
95 Km S of Ancona (100861 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km NE of Tivoli (56533 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 2021-02-28
04:00:24
42.7882 13.2232 9 2021-07-12
16:55:01
Bollettino Sismico Italiano INGV 87946121
Reviewed
Rev100
ML 1.8 2021-02-28
04:00:24
42.7867 13.2287 9 2021-02-28
04:34:20
Sala Sismica INGV-Roma 87559871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-28 04:00:24 ± 0.06
Latitude 42.7882 ± 0.0027
Longitude 13.2232 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87946121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 418
Semi-minor axis of confidence ellipse (meter) 154
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 83
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 46
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.09173
Epicentral distance of station farthest from the epicenter (degree) 0.54769
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 87946121
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-09 16:58:55

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 87559871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-28 04:34:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-02-28T04:00:44.98 0.3 undecidable manual S 351 60.7947 50 1.03 50
IV.MOMA.HNZ. 2021-02-28T04:00:42.58 0.3 undecidable manual S 272 53.2023 50 0.67 60
IV.MNTT.EHZ. 2021-02-28T04:00:40.12 0.6 undecidable manual S 45 42.8238 50 0.96 36
IV.MML1.HNE. 2021-02-28T04:00:38.59 0.3 undecidable manual S 331 41.4252 50 -0.19 69
IV.SAP2.EHE. 2021-02-28T04:00:38.29 0.3 undecidable manual S 23 37.1295 50 0.68 61
IV.PF6.EHN. 2021-02-28T04:00:37.89 0.3 undecidable manual S 357 38.8278 50 -0.2 70
IV.CESI.HHZ. 2021-02-28T04:00:37.04 0.3 undecidable manual S 313 35.3424 50 -0.1 71
IV.TERO.HHZ. 2021-02-28T04:00:36.61 0.3 undecidable manual S 120 36.0417 50 -0.73 60
IV.GUMA.HHZ. 2021-02-28T04:00:36.71 0.3 undecidable manual S 17 31.746 105 0.56 65
IV.CSP1.EHZ. 2021-02-28T04:00:36.33 0.3 undecidable manual S 357 33.744 50 -0.38 67
IV.MF5.EHZ. 2021-02-28T04:00:35.83 0.3 undecidable manual S 41 29.3484 106 0.5 66
IV.EL6.EHZ. 2021-02-28T04:00:35.83 0.1 undecidable manual P 351 60.7947 50 0.01 93
IV.GAVE.EHN. 2021-02-28T04:00:35.11 0.6 undecidable manual S 248 28.8489 107 -0.06 49
IV.RM33.EHZ. 2021-02-28T04:00:35.98 0.3 undecidable manual S 181 30.9468 106 0.1 72
IV.FDMO.HHZ. 2021-02-28T04:00:35.23 0.3 undecidable manual S 338 29.6481 106 -0.22 70
IT.MTCL.HGZ. 2021-02-28T04:00:34.78 0.3 undecidable manual S 322 29.1486 107 -0.5 66
IV.LNSS.HHZ. 2021-02-28T04:00:34.57 0.3 undecidable manual S 216 25.3524 109 0.54 66
IV.MOMA.HNZ. 2021-02-28T04:00:34.71 0.1 undecidable manual P 272 53.2023 50 0.06 93
IV.MNTT.EHZ. 2021-02-28T04:00:33.68 0.1 undecidable manual P 45 42.8238 50 0.62 82
IV.FEMA.HNE. 2021-02-28T04:00:33.57 0.3 undecidable manual S 324 23.8539 110 0.03 74
IV.SAP2.EHE. 2021-02-28T04:00:32.57 1.0 undecidable manual P 23 37.1295 50 0.41 22
IV.PF6.EHN. 2021-02-28T04:00:32.05 0.1 undecidable manual P 357 38.8278 50 -0.39 89
IV.T1299.HNN. 2021-02-28T04:00:32.03 0.6 undecidable manual S 164 17.7711 116 0.46 46
IV.MML1.HNE. 2021-02-28T04:00:32.68 0.1 undecidable manual P 331 41.4252 50 -0.16 93
IV.GUMA.HHZ. 2021-02-28T04:00:31.35 0.1 undecidable manual P 17 31.746 105 0.03 97
IV.CSP1.EHZ. 2021-02-28T04:00:31.31 0.1 undecidable manual P 357 33.744 50 -0.34 91
IV.TERO.HHZ. 2021-02-28T04:00:31.45 0.1 undecidable manual P 120 36.0417 50 -0.56 86
IV.RM33.EHZ. 2021-02-28T04:00:31.00 0.1 undecidable manual P 181 30.9468 106 -0.16 95
IV.CESI.HHZ. 2021-02-28T04:00:31.84 0.1 undecidable manual P 313 35.3424 50 -0.05 96
IV.LNSS.HHZ. 2021-02-28T04:00:30.16 0.1 undecidable manual P 216 25.3524 109 0.07 98
IV.MMO1.EHZ. 2021-02-28T04:00:30.41 0.3 undecidable manual S 34 14.9739 120 -0.3 71
IV.FDMO.HHZ. 2021-02-28T04:00:30.66 0.1 undecidable manual P 338 29.6481 106 -0.25 93
IT.MTCL.HGZ. 2021-02-28T04:00:30.64 0.1 undecidable manual P 322 29.1486 107 -0.18 95
IV.MTRA.EHZ. 2021-02-28T04:00:30.32 0.3 undecidable manual S 104 14.5743 121 -0.27 71
IV.MF5.EHZ. 2021-02-28T04:00:30.91 0.1 undecidable manual P 41 29.3484 106 0.06 97
IV.CAMP.HHE. 2021-02-28T04:00:30.81 1.0 undecidable manual P 152 31.8459 105 -0.52 22
IV.GAVE.EHN. 2021-02-28T04:00:30.74 0.6 undecidable manual P 248 28.8489 107 -0.01 49
IV.MC2.EHZ. 2021-02-28T04:00:30.54 0.3 undecidable manual S 349 13.9749 122 0.12 74
IV.NRCA.HHZ. 2021-02-28T04:00:29.54 0.3 undecidable manual S 300 10.1787 130 0.18 73
IV.FEMA.HNE. 2021-02-28T04:00:29.04 0.3 undecidable manual P 324 23.8539 110 -0.77 60
IV.MC2.EHZ. 2021-02-28T04:00:28.17 0.1 undecidable manual P 349 13.9749 122 0.16 98
IV.T1299.HNN. 2021-02-28T04:00:28.95 0.1 undecidable manual P 164 17.7711 116 0.28 95
IV.SMA1.EHZ. 2021-02-28T04:00:28.93 0.1 undecidable manual P 152 19.7691 114 -0.11 98
IV.MMO1.EHZ. 2021-02-28T04:00:28.05 0.1 undecidable manual P 34 14.9739 120 -0.13 98
IV.MTRA.EHZ. 2021-02-28T04:00:28.15 0.1 undecidable manual P 104 14.5743 121 0.04 100
IV.NRCA.HHZ. 2021-02-28T04:00:27.55 0.1 undecidable manual P 300 10.1787 130 0.15 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:1.9 0.0010550000000000002 1.32 AML other m 2021-02-28T04:00:29.87
IV.NRCA.HHE. ML:1.9 0.0010950000000000003 1.32 AML other m 2021-02-28T04:00:29.87
IV.NRCA.HHN. ML:1.9 0.001095 0.32 AML other m 2021-02-28T04:00:29.81
IV.NRCA.HNN. ML:1.9 0.001105 0.32 AML other m 2021-02-28T04:00:29.97
IV.MTRA.HNN. ML:1.9 0.0008185 1.64 AML other m 2021-02-28T04:00:30.00
IV.MTRA.EHN. ML:1.9 0.0007975 1.62 AML other m 2021-02-28T04:00:30.01
IV.MTRA.HNE. ML:1.8 0.0006559999999999999 0.24 AML other m 2021-02-28T04:00:31.39
IV.MTRA.EHE. ML:1.8 0.000657 0.24 AML other m 2021-02-28T04:00:31.39
IV.LNSS.HHE. ML:1.6 0.00023199999999999997 0.14 AML other m 2021-02-28T04:00:35.35
IV.LNSS.HHN. ML:1.5 0.000169 0.8 AML other m 2021-02-28T04:00:35.78
IV.SMA1.EHE. ML:1.4 0.0001785 0.44 AML other m 2021-02-28T04:00:36.06
IV.TERO.HHN. ML:1.6 0.00016749999999999998 0.78 AML other m 2021-02-28T04:00:36.87
IV.TERO.HHE. ML:1.5 0.000114 0.14 AML other m 2021-02-28T04:00:37.06
IV.GUMA.HNE. ML:2.0 0.00047349999999999996 0.3 AML other m 2021-02-28T04:00:37.45
IV.CSP1.EHE. ML:2.0 0.0004035 0.88 AML other m 2021-02-28T04:00:37.61
IV.GUMA.HHE. ML:2.1 0.000632 0.36 AML other m 2021-02-28T04:00:37.44
IV.CSP1.EHN. ML:1.9 0.000334 1.46 AML other m 2021-02-28T04:00:37.11
IV.SMA1.EHN. ML:1.3 0.000154 1.3 AML other m 2021-02-28T04:00:40.17
IV.CESI.HHE. ML:1.2 0.000071255495 0.1216 AML other m 2021-02-28T04:00:38.15
IV.CESI.HHN. ML:1.5 0.00012485088 0.16 AML other m 2021-02-28T04:00:37.89
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