Earthquake with magnitude of ML 1.1 on date 28-02-2021 and time 02:33:25 (Italy) in region 2 km W Amatrice (RI)

A magnitude ML 1.1 earthquake occured in region: 2 km W Amatrice (RI), on

  • 28-02-2021 01:33:25 (UTC)
  • 28-02-2021 02:33:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.63, 13.27 at 15 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
Amatrice RI 2 2657 2657
Accumoli RI 8 667 3324
Cittareale RI 9 482 3806
Campotosto AQ 11 542 4348
Montereale AQ 12 2581 6929
Capitignano AQ 12 665 7594
Arquata del Tronto AP 16 1178 8772
Borbona RI 17 617 9389
Posta RI 18 694 10083
Cagnano Amiterno AQ 19 1369 11452
Crognaleto TE 19 1297 12749
Acquasanta Terme AP 20 2916 15665
Barete AQ 20 737 16402
Cortino TE 20 656 17058

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NW of L'Aquila (69753 inhabitants)
36 Km W of Teramo (54892 inhabitants)
51 Km E of Terni (111501 inhabitants)
59 Km SE of Foligno (57155 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
80 Km W of Pescara (121014 inhabitants)
80 Km W of Chieti (51815 inhabitants)
83 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km NE of Tivoli (56533 inhabitants)
89 Km SE of Perugia (166134 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
Reviewed
Rev100
ML 1.1 2021-02-28
01:33:25
42.63 13.27 15 2021-02-28
01:42:07
Sala Sismica INGV-Roma 87555731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-28 01:33:25 ± 0.09
Latitude 42.63 ± 0.00
Longitude 13.27 ± 0.00
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87555731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 415
Semi-minor axis of confidence ellipse (meter) 296
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 45
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.01079
Epicentral distance of station farthest from the epicenter (degree) 0.46585
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 13
Type of magnitude ML
Reference to an origin 87555731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-28 01:42:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-02-28T01:33:42.06 0.3 undecidable manual S 354 0.4658 96 0.53 62
IV.FDMO.HHZ. 2021-02-28T01:33:40.58 0.6 undecidable manual S 342 0.429 96 0.13 46
IV.MMO1.EHZ. 2021-02-28T01:33:36.07 0.3 undecidable manual S 9 0.2743 102 0.16 71
IV.TERO.HHZ. 2021-02-28T01:33:34.80 0.3 undecidable manual S 91 0.2464 104 -0.29 70
IV.CSP1.EHZ. 2021-02-28T01:33:34.51 0.3 undecidable manual P 354 0.4658 96 -0.12 69
IV.NRCA.HNE. 2021-02-28T01:33:34.53 0.3 undecidable manual S 331 0.2347 105 -0.24 70
IV.FDMO.HHZ. 2021-02-28T01:33:33.85 0.3 undecidable manual P 342 0.429 96 -0.16 69
IV.MTRA.EHZ. 2021-02-28T01:33:32.29 0.3 undecidable manual S 36 0.1592 118 -0.38 69
IV.LNSS.HHZ. 2021-02-28T01:33:32.85 0.3 undecidable manual S 262 0.17 115 -0.13 72
IV.RM33.EHZ. 2021-02-28T01:33:31.77 0.3 undecidable manual S 199 0.1259 126 -0.07 74
IV.MC2.EHE. 2021-02-28T01:33:31.66 0.1 undecidable manual P 348 0.2896 101 0.02 97
IV.MMO1.EHZ. 2021-02-28T01:33:31.31 0.3 undecidable manual P 9 0.2743 102 -0.08 73
IV.SMA1.EHZ. 2021-02-28T01:33:30.47 0.3 undecidable manual S 87 0.0486 156 0.08 77
IV.NRCA.HNE. 2021-02-28T01:33:30.69 0.1 undecidable manual P 331 0.2347 105 -0.05 98
IV.TERO.HHZ. 2021-02-28T01:33:30.91 0.3 undecidable manual P 91 0.2464 104 -0.01 74
IV.T1299.HNN. 2021-02-28T01:33:30.06 0.3 undecidable manual S 57 0.0108 174 -0.04 75
IV.LNSS.HHZ. 2021-02-28T01:33:29.75 0.1 undecidable manual P 262 0.17 115 0.05 99
IV.RM33.EHZ. 2021-02-28T01:33:29.23 0.3 undecidable manual P 199 0.1259 126 0.19 73
IV.MTRA.EHZ. 2021-02-28T01:33:29.53 0.1 undecidable manual P 36 0.1592 118 0.01 100
IV.T1299.HNN. 2021-02-28T01:33:28.24 0.1 undecidable manual P 57 0.0108 174 0.2 100
IV.SMA1.EHZ. 2021-02-28T01:33:28.45 0.1 undecidable manual P 87 0.0486 156 0.25 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:0.9 9.34E-5 0.7 AML other m 2021-02-28T01:33:30.88
IV.SMA1.EHE. ML:1.1 0.000135 0.5 AML other m 2021-02-28T01:33:31.68
IV.RM33.HNE. ML:1.3 0.00016141195 1.46 AML other m 2021-02-28T01:33:32.21
IV.RM33.HNN. ML:1.1 0.00011229153 0.4696 AML other m 2021-02-28T01:33:32.07
IV.RM33.EHE. ML:1.2 0.000129928735 0.12 AML other m 2021-02-28T01:33:32.21
IV.RM33.EHN. ML:1.1 9.548227E-5 0.16 AML other m 2021-02-28T01:33:31.99
IV.MTRA.HNE. ML:1.3 0.000139081155 2.78 AML other m 2021-02-28T01:33:32.15
IV.MTRA.HNN. ML:1.2 0.00012442775 1.98 AML other m 2021-02-28T01:33:32.02
IV.MTRA.EHE. ML:1 6.250237E-5 0.08 AML other m 2021-02-28T01:33:32.55
IV.MTRA.EHN. ML:0.8 4.8927235E-5 0.12 AML other m 2021-02-28T01:33:32.50
IV.LNSS.HHE. ML:0.8 4.5219945E-5 0.14 AML other m 2021-02-28T01:33:33.67
IV.LNSS.HHN. ML:0.6 3.2326335E-5 0.16 AML other m 2021-02-28T01:33:33.08
IV.TERO.HHN. ML:1 5.3029663E-5 1.44 AML other m 2021-02-28T01:33:34.67
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