Earthquake with magnitude of ML 1.2 on date 06-04-2021 and time 08:39:17 (UTC) in region 4 km E Amatrice (RI)

A magnitude ML 1.2 earthquake occured in region: 4 km E Amatrice (RI), on

  • 06-04-2021 08:39:17 (UTC)
  • 06-04-2021 10:39:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.62, 13.33 at 8 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 4 2657 2657
Campotosto AQ 8 542 3199
Accumoli RI 11 667 3866
Capitignano AQ 11 665 4531
Montereale AQ 13 2581 7112
Cittareale RI 14 482 7594
Crognaleto TE 15 1297 8891
Cortino TE 15 656 9547
Arquata del Tronto AP 17 1178 10725
Rocca Santa Maria TE 18 537 11262
Acquasanta Terme AP 18 2916 14178
Fano Adriano TE 19 296 14474
Valle Castellana TE 19 977 15451
Barete AQ 19 737 16188
Cagnano Amiterno AQ 20 1369 17557
Borbona RI 20 617 18174

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km N of L'Aquila (69753 inhabitants)
31 Km W of Teramo (54892 inhabitants)
56 Km E of Terni (111501 inhabitants)
63 Km SE of Foligno (57155 inhabitants)
68 Km W of Montesilvano (53738 inhabitants)
75 Km W of Pescara (121014 inhabitants)
75 Km W of Chieti (51815 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
85 Km NE of Tivoli (56533 inhabitants)
94 Km SE of Perugia (166134 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.2 2021-04-06
08:39:17
42.6202 13.3302 8 2021-04-06
08:45:17
Sala Sismica INGV-Roma 88814801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-06 08:39:17 ± 0.07
Latitude 42.6202 ± 0.0027
Longitude 13.3302 ± 0.0037
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 88814801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 326
Semi-minor axis of confidence ellipse (meter) 69
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 46
Circular confidence region, given by single value of horizontal uncertainty (meter) 330
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
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) 0.51081
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 88814801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-06 08:45:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-04-06T08:39:28.20 0.6 undecidable manual S 359 0.2788 105 0.07 48
IV.T0110.HHZ. 2021-04-06T08:39:27.44 0.3 undecidable manual P 140 0.5108 50 -0.11 69
IV.CSP1.EHZ. 2021-04-06T08:39:27.19 0.3 undecidable manual P 349 0.4802 50 0.16 69
IV.NRCA.HHZ. 2021-04-06T08:39:27.37 0.6 undecidable manual S 323 0.2662 105 -0.26 47
IV.GIGS.HHE. 2021-04-06T08:39:26.24 0.6 undecidable manual S 133 0.2446 107 -0.6 43
IV.TERO.HHZ. 2021-04-06T08:39:25.24 0.3 undecidable manual S 89 0.2014 110 -0.02 75
IV.LNSS.HHN. 2021-04-06T08:39:25.76 0.6 undecidable manual S 265 0.214 109 0.04 49
IV.MTRA.EHZ. 2021-04-06T08:39:23.35 0.3 undecidable manual S 20 0.1448 117 0.08 74
IV.NRCA.HHZ. 2021-04-06T08:39:23.07 0.1 undecidable manual P 323 0.2662 105 -0.07 97
IV.RM33.EHZ. 2021-04-06T08:39:23.19 0.6 undecidable manual S 218 0.1403 118 0.09 50
IV.MMO1.EHZ. 2021-04-06T08:39:23.03 0.3 undecidable manual P 359 0.2788 105 -0.4 68
IV.GIGS.HHE. 2021-04-06T08:39:22.49 0.3 undecidable manual P 133 0.2446 107 -0.2 71
IV.CAMP.HHE. 2021-04-06T08:39:21.89 0.6 undecidable manual S 145 0.1025 126 0.03 51
IV.TERO.HHZ. 2021-04-06T08:39:21.92 0.1 undecidable manual P 89 0.2014 110 0.14 97
IV.LNSS.HHN. 2021-04-06T08:39:21.95 0.1 undecidable manual P 265 0.214 109 -0.09 98
IV.RM33.EHZ. 2021-04-06T08:39:20.67 0.1 positive manual P 218 0.1403 118 0.14 98
IV.MTRA.EHZ. 2021-04-06T08:39:20.85 0.3 undecidable manual P 20 0.1448 117 0.23 72
IV.CAMP.HHE. 2021-04-06T08:39:20.01 0.1 undecidable manual P 145 0.1025 126 0.2 98
IV.T1299.EHN. 2021-04-06T08:39:19.94 0.3 undecidable manual S 292 0.0378 153 -0.25 73
IV.SMA1.EHZ. 2021-04-06T08:39:19.77 0.3 undecidable manual S 20 0.0108 171 -0.09 76
IV.T1299.EHN. 2021-04-06T08:39:18.99 0.1 undecidable manual P 292 0.0378 153 0.14 100
IV.SMA1.EHZ. 2021-04-06T08:39:18.88 0.1 undecidable manual P 20 0.0108 171 0.22 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:1 0.0001115 0.86 AML other m 2021-04-06T08:39:23.29
IV.MTRA.EHE. ML:1.3 0.0002035 0.42 AML other m 2021-04-06T08:39:23.47
IV.RM33.EHE. ML:1.2 0.0001475 1.04 AML other m 2021-04-06T08:39:23.86
IV.MTRA.EHN. ML:1.2 0.0001465 1.34 AML other m 2021-04-06T08:39:24.91
IV.TERO.HHN. ML:1.4 0.000181 0.3 AML other m 2021-04-06T08:39:25.52
IV.TERO.HHE. ML:1.3 0.0001505 0.14 AML other m 2021-04-06T08:39:25.84
IV.NRCA.HHN. ML:1.1 6.05E-5 0.54 AML other m 2021-04-06T08:39:27.74
IV.NRCA.HHE. ML:1.3 0.0001122 0.38 AML other m 2021-04-06T08:39:27.76
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