Earthquake with magnitude of ML 1.0 on date 03-08-2020 and time 21:16:28 (UTC) in region 5 km W Amatrice (RI)

A magnitude ML 1.0 earthquake occured in region: 5 km W Amatrice (RI), on

  • 03-08-2020 21:16:28 (UTC)
  • 03-08-2020 23:16:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.64, 13.23 at 10 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 5 2657 2657
Accumoli RI 6 667 3324
Cittareale RI 7 482 3806
Montereale AQ 13 2581 6387
Capitignano AQ 15 665 7052
Campotosto AQ 15 542 7594
Arquata del Tronto AP 16 1178 8772
Borbona RI 17 617 9389
Posta RI 17 694 10083
Cascia PG 20 3217 13300

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km NW of L'Aquila (69753 inhabitants)
39 Km W of Teramo (54892 inhabitants)
49 Km E of Terni (111501 inhabitants)
56 Km SE of Foligno (57155 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
83 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km W of Pescara (121014 inhabitants)
83 Km W of Chieti (51815 inhabitants)
83 Km NE of Tivoli (56533 inhabitants)
86 Km SE of Perugia (166134 inhabitants)
96 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 1.0 2020-08-03
21:16:28
42.64 13.23 10 2020-08-03
21:24:13
Sala Sismica INGV-Roma 81623351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-03 21:16:28 ± 0.06
Latitude 42.64 ± 0.00
Longitude 13.23 ± 0.00
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81623351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 313
Semi-minor axis of confidence ellipse (meter) 254
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 144
Circular confidence region, given by single value of horizontal uncertainty (meter) 310
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
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) 0.07554
Epicentral distance of station farthest from the epicenter (degree) 0.34984
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 81623351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-03 21:24:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2020-08-03T21:16:39.35 0.3 undecidable manual S 15 0.2662 50 0.1 73
IV.NRCA.HHZ. 2020-08-03T21:16:37.41 0.3 undecidable manual S 335 0.2104 113 -0.13 73
IV.ARRO.EHZ. 2020-08-03T21:16:36.07 1.0 negative manual P 260 0.3498 50 -0.16 24
IV.MTRA.EHZ. 2020-08-03T21:16:35.70 0.6 undecidable manual S 46 0.1655 119 -0.27 48
IV.LNSS.HHZ. 2020-08-03T21:16:35.49 0.3 undecidable manual S 255 0.1475 122 0.12 74
IV.RM33.EHZ. 2020-08-03T21:16:34.65 0.3 undecidable manual S 186 0.134 124 -0.28 72
IV.GAVE.EHZ. 2020-08-03T21:16:34.52 0.1 undecidable manual P 281 0.2545 50 -0.07 98
IV.MMO1.EHZ. 2020-08-03T21:16:34.79 1.0 undecidable manual P 15 0.2662 50 0 25
IV.SMA1.EHZ. 2020-08-03T21:16:33.35 0.3 undecidable manual S 99 0.0755 140 0.1 75
IV.NRCA.HHZ. 2020-08-03T21:16:33.82 0.3 negative manual P 335 0.2104 113 0.02 75
IV.LNSS.HHZ. 2020-08-03T21:16:32.69 0.1 undecidable manual P 255 0.1475 122 0.14 98
IV.MTRA.EHZ. 2020-08-03T21:16:32.86 0.1 positive manual P 46 0.1655 119 -0.04 100
IV.RM33.EHZ. 2020-08-03T21:16:32.28 0.6 negative manual P 186 0.134 124 -0.01 51
IV.SMA1.EHZ. 2020-08-03T21:16:31.53 0.1 positive manual P 99 0.0755 140 0.2 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.6 0.0006319902 0.2688 AML other m 2020-08-03T21:16:33.56
IV.SMA1.EHN. ML:1.2 0.0002211103 0.192 AML other m 2020-08-03T21:16:33.66
IV.RM33.EHE. ML:1.1 0.000107849635 0.1152 AML other m 2020-08-03T21:16:35.19
IV.RM33.EHN. ML:0.8 6.0919565E-5 0.2688 AML other m 2020-08-03T21:16:35.50
IV.LNSS.HHE. ML:0.9 6.5132865E-5 0.1152 AML other m 2020-08-03T21:16:36.36
IV.LNSS.HHN. ML:0.9 6.974713E-5 0.1792 AML other m 2020-08-03T21:16:35.54
IV.MTRA.EHE. ML:0.9 6.521665E-5 0.128 AML other m 2020-08-03T21:16:36.00
IV.MTRA.EHN. ML:0.8 4.31108E-5 0.1792 AML other m 2020-08-03T21:16:36.15
IV.NRCA.HHE. ML:1 6.337652E-5 0.1152 AML other m 2020-08-03T21:16:37.59
IV.NRCA.HHN. ML:0.9 4.7828835E-5 0.1408 AML other m 2020-08-03T21:16:38.29
IV.GAVE.EHE. ML:1.1 6.7315995E-5 0.1024 AML other m 2020-08-03T21:16:41.70
IV.GAVE.EHN. ML:0.9 4.222193E-5 0.0896 AML other m 2020-08-03T21:16:37.94
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